Current Issues in Sport Science (CISS)最新文献

{"title":"The development of Swiss sports clubs: Membership, volunteering, professionalization","authors":"Rahel Bürgi, Angela Gebert, H. Stamm, M. Lamprecht","doi":"10.36950/2024.2ciss010","DOIUrl":"https://doi.org/10.36950/2024.2ciss010","url":null,"abstract":"Introduction\u0000The Swiss Sports Observatory has been conducting the national club survey since 1996. Every six years, the club managers of all sports clubs belonging to an association affiliated to Swiss Olympic are asked to complete a questionnaire. The survey is supported by Swiss Olympic, the Federal Office of Sport and other partners and provides information on the development of Swiss sports clubs, their structures and performance, as well as their strategies and prospects. The latest club survey was published at the end of 2023 (Bürgi et al., 2023).\u0000Methods\u0000The 2023 club survey is based on an online survey of 6,782 sports clubs. With a total of 18,229 sports clubs contacted, this results in a participation rate of 37.2%. The results were validated and their representativeness checked through various comparisons with other surveys (survey of the associations and the population surveys \"Sport Schweiz 2020\" and \"Freiwilligen-Monitor\").\u0000Results\u0000The number of sports clubs - but not the number of active members - has fallen slightly in recent years. However, the large number of small clubs continues to characterize the Swiss club system. The high density of clubs ensures a wide range of activities, but also ties up a lot of resources and leads to increased fluctuation among members. The vast majority of active members as well as children and young people are active in medium-sized and large clubs. The number of active club members has remained stable for many years. There has been no decline in club memberships, but the clubs cannot profit from population growth and the sports boom. There are also significant changes in the club structure: clubs are growing among children but losing members among adults. This development has an impact on the recruitment of volunteers. Voluntary work therefore remains the foundation of club sport, but also the number one challenge. The problem cannot be solved with increased professionalization. Although there is more paid work in clubs today, the need for volunteers is still growing. Club budgets also place limits on professionalization. Staff cost is already the largest expense item today. The financial situation of Swiss sports clubs has not generally deteriorated in recent years. However, it has not been possible to tap into new sources of income either and membership fees cannot be increased at will.\u0000Discussion/Conclusion\u0000Overall, Swiss sports clubs have coped well with the various challenges of recent years. At the same time, the proportion of clubs facing problems that threaten their existence is increasing. Only with the active further development of club work and differentiated approaches to solutions, which help to meet the growing demands placed on clubs and the associated increased need for volunteers and paid staff, will clubs remain a central pillar of Swiss sport in the future (Lamprecht & Nagel, 2022).\u0000References\u0000Bürgi, R., Lamprecht, M., Gebert, A. & Stamm, H. P. (2023). Sportvereine in der Schweiz ","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"489 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dream incorporation of three different bodily stimuli","authors":"E. Peters, Xinlin Wang, Martin Dresler, Daniel Erlacher","doi":"10.36950/2024.2ciss006","DOIUrl":"https://doi.org/10.36950/2024.2ciss006","url":null,"abstract":"Introduction\u0000Lucid dreaming opens the possibility to rehearse sport skills within a dream while sleeping (Peters et al. 2023; Stumbrys et al. 2016). But so far, no induction techniques have been developed to induce reliable lucid dreams. One potential technique is to apply external stimulation while a person is sleeping in order to send a hint into the dream which might enhance lucidity in the ongoing dream. Several studies have tested dream incorporation rates (DIR) with different stimuli and different results (Schredl, 2018), but none with a larger sample size and a within-design. Furthermore, in this study we wanted to explore body related stimulations to evoke in future studies lucid dreams.\u0000Methods\u000010-Channel polysomnography and three different bodily stimulation methods were combined during three consecutive test nights with each night using one stimulation method (plus adaptation night). The three stimulation methods consisted of electrical forearm muscle stimulation (EMS), galvanic vestibular stimulation (GVS), and haptic vibration stimulation (HS). During REM sleep, one of the three stimuli was presented or a sham condition was applied in a counterbalanced order. The stimuli were followed by REM awakenings, resulting in corresponding verbal dream reports. With the help of those reports, the translation from a physical arm movement, vestibular sensation and vibration into the dream environment was investigated using dream content analysis. Movement of the dream arm, balance related activity and tactile or somatosensory sensations targeted the dream incorporations of EMS, GVS and HS respectively.\u0000Results\u0000Movement of the arm was present in 23.2%, 8.1% and 23.5% of EMS, GVS and HS dreams respectively. Balance-related activity was present in 6.1%, 7.9% and 5.8% of EMS, GVS and HS dreams respectively. Finally, tactile and somatosensory sensations were present in 13.6%, 0% and 6.3% of the EMS, GVS and HS dreams respectively. After correcting for sham condition, tactile and somatosensory sensations on the EMS dreams seem to be the strongest incorporation effect upon stimulation.\u0000Discussion/Conclusion\u0000We tested dream incorporation of three different stimulation methods using a within-design on a larger sample size, a method that has never been attempted before. GVS appears unsuccessful in altering dream content, but this might be confounded due to challenges in methodology. EMS evokes the most dream incorporation in the scale of tactile and somatosensory dream content followed by HS. The investigation of the incorporation of external kinesthetic stimulation into dream content represents a fundamental contribution to various scientific fields and could foster future research on lucid dream induction, enabling the further exploration of sport practice in a sleep state.\u0000References\u0000Peters, E., Golembiewski, S., Erlacher, D., & Dresler, M. (2023). Extending mental practice to sleep: Enhancing motor skills through lucid dreaming. Medical Hypotheses, 17","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"53 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Repetitive magnetic stimuli over the motor cortex impair long-term consolidation of a balance task by suppressing up-regulation of intracortical inhibition","authors":"Sven Egger, M. Wälchli, Samuel Meyer, Wolfgang Taube","doi":"10.36950/2024.2ciss039","DOIUrl":"https://doi.org/10.36950/2024.2ciss039","url":null,"abstract":"Introduction \u0000Recent findings have demonstrated that low-frequency repetitive magnetic stimulations (rTMS) over the primary motor cortex (M1) impaired short-term consolidation of a balance task, underscoring the causal connection between M1 and the consolidation of balancing skills (Egger et al., 2023). However, the underlying neural mechanisms induced by rTMS and whether these adaptations endure over an extended period, encompassing multiple acquisition sessions, remain insufficiently elucidated (Censor & Cohen, 2011). So far, its is widely acknowledged that GABAergic processes play an important role for consolidation (Sanes & Donoghue, 2000), at the same time, are affected by learning balance skills (Mouthon & Taube, 2019; Taube et al., 2020). Therefore, the present study aimed to investigate the impact of rTMS on GABA-mediated short-interval intracortical inhibition (SICI) and to explore the role of M1 in the long-term consolidation of a balance task (i.e., across multiple acquisition sessions). \u0000Methods \u0000Thirty-one volunteers underwent six balance acquisition sessions on a rocker-board, each followed by either rTMS or sham rTMS based on group affiliation. During the first and last training session, SICI was measured twice; before the balance acquisition and after the application of rTMS or sham-rTMS to investigate potential short- and long-term adaptations in intracortical inhibition. Adaptations were assessed during the execution of the learned balance task and in a non-learning postural control task (i.e., stable upright stance). \u0000Results \u0000Regardless of group affiliation, all participants achieved comparable improvements within the balance acquisition sessions. However, consolidation varied between groups. In particular, between the third and the fourth acquisition session, as Tukey corrected post-hoc tests showed a significant decline in performance for the rTMS group (p = 0.006). Both short- (p = 0.014) and long-term (p = 0.038) adaptations in SICI were affected by rTMS: while the sham rTMS group upregulated SICI, rTMS led to reduced levels of inhibition. No neurophysiological effects were observed in the non-learning control task (upright stance). \u0000Discussion/Conclusion \u0000The interfering effect of rTMS on balance consolidation and on upregulation of SICI indicates that increased intracortical inhibition is an important mechanism to protect and engrave newly acquired motor memory. Importantly, adaptations in SICI were only apparent during the execution of the learned task. \u0000References \u0000Censor, N., & Cohen, L. G. (2011). Using repetitive transcranial magnetic stimulation to study the underlying neural mechanisms of human motor learning and memory. The Journal of Physiology, 589(1), 21-28. https://doi.org/10.1113/jphysiol.2010.198077 \u0000Egger, S., Wälchli, M., Rüeger, E., & Taube, W. (2023). Short-term balance consolidation relies on the primary motor cortex: A rTMS study. Scientific Reports, 13, Article 5169. https://doi.org/10.1038/s41598-02","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"55 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing the accuracy of photoplethysmography for wearable heart rate monitoring based on body location and body motion in uncontrolled outdoor environments","authors":"Manuel Meier, Christian Holz","doi":"10.36950/2024.2ciss059","DOIUrl":"https://doi.org/10.36950/2024.2ciss059","url":null,"abstract":"Introduction \u0000Reflective photoplethysmography (PPG) is the dominant method for heart rate (HR) monitoring consumer wearables. However, motion artifacts and sensor placement impact the accuracy of these HR measurements. Here, we present a study on how these two factors affect the accuracy of PPG-based HR measurements and compare them to ground-truth measurements from electrocardiography (ECG). Our study investigated these measurements in outdoor environments outside controlled laboratory settings. \u0000Methods \u0000Our study collected a dataset of 16 participants, each for 13 hours wearing four reflective PPG sensing devices placed at the forehead, sternum, ankle (supramalleolar), and wrist. Participants traveled by train from downtown Zurich to the Jungfraujoch railway station at 3,460 m above sea level in the mountains. PPG measurements were obtained using a MAX86141 optical analog front-end coupled with a green LED and photodiode from an SFH7072 module. Motion was quantified using two accelerometers (LIS2DH, ADXL355). A Lead I ECG was obtained by the device at the sternum using a MAX30003 biopotential sensor connected to gel electrodes on the chest. All devices were synchronized by aligning recorded signals post-hoc (33ms accuracy, Meier & Holz, 2023). The HR was extracted from the ECG by time-domain peak detection. The HR extraction from PPG was both performed by time-domain peak detection and frequency-domain analysis. The HR was computed every 5 seconds (30 seconds window size) resulting in 152,000 HR measurements across the whole dataset. \u0000Results \u0000The forehead and chest locations exhibited the highest HR measurement accuracy (median error 7.1% and 7.7%, respectively), while lower accuracies were observed for ankle and wrist placements (9.9% and 18.4% error). At rest, all median errors were below 5% while movements influenced readings at all locations negatively. Adjusted for motion, the HR obtained from the forehead sensor was most accurate. In terms of processing method, time-domain analysis produced better accuracy during periods of low motion while frequency-domain analysis was more reliable during movements. \u0000Discussion/Conclusion \u0000The accuracy of PPG-based HR measurements in uncontrolled outdoor settings is affected both by body location and motion artifacts with a clear ranking of site suitability: forehead >> chest >> ankle >> wrist. This is consistent with prior studies in controlled environments, though our study found a higher impact of motion than body location on HR accuracy (Longmore et al., 2019). This may be because participants’ motions in uncontrolled environments are more irregular and diverse, resulting in deteriorated signal quality. Our study shows the importance of further investigations in everyday conditions on the path toward more reliable PPG-based HR monitoring in wearable devices. \u0000References \u0000Longmore, S. K., Lui, G. Y., Naik, G., Breen, P. P., Jalaludin, B., & Gargiulo, G. D. (2019). A comparison of reflective photopl","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"50 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Perceived Instrumental Effects of Maltreatment in Sport (PIEMS) scale: Translation, (cross-)validation, and short-form development of the German version","authors":"Laurie Schwab, Philipp Röthlin, Roberta Antonini Philippe, Stephan Horvath","doi":"10.36950/2024.2ciss070","DOIUrl":"https://doi.org/10.36950/2024.2ciss070","url":null,"abstract":"Introduction \u0000Beliefs about the instrumental effects of maltreatment are a factor explaining abuse in sports. The availability of a valid and reliable German scale measuring these beliefs is essential for a better understanding of the concept. This article introduces and validates the German version of the Perceived Instrumental Effects of Maltreatment in Sport scale (PIEMS-G-14). \u0000Methods \u0000Study 1 examines the translation and evaluation of the scale structure, the development of a short version (PIEMS-G-6), and both the full and short versions’ construct validity and reliability in a sample of youth sports coaches (n = 628). Studies 2 (n = 444) and 3 (n = 423) focus on cross-validating the structure of the PIEMS-G-14 and PIEMS-G-6 in two independent samples of youth sports coaches and provide further evidence of the construct validity and reliability of the scales. \u0000Results \u0000Despite a reduction in the number of items compared to the original instrument, the PIEMS-G-14 exhibited robust measurement capabilities. The PIEMS-G-6, also demonstrated promising psychometric properties in assessing coaches’ beliefs about the instrumental effects of maltreatment. The reliability and validity of both the PIEMS-G-14 and PIEMS-G-6 were further supported by rigorous examination with two independent samples, providing compelling evidence of their construct validity. \u0000Discussion/Conclusion \u0000The PIEMS-G-14 and PIEMS-G-6 are suitable for use in assessing beliefs about the instrumental effects of maltreatment in German-speaking sports contexts.","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"10 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139858241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Textile wearable system for knee angle monitoring in three planes","authors":"Alice Fornaciari, Chakaveh Ahmadizadeh, Valeria Galli, C. Menon","doi":"10.36950/2024.2ciss043","DOIUrl":"https://doi.org/10.36950/2024.2ciss043","url":null,"abstract":"Introduction \u0000Monitoring biomechanics is crucial in sports and rehabilitation, and frontal knee angle is of special interest in these applications. Current solutions – optical motion capture (OMC), or inertial measurement units suits – are costly, spatially constrained, and impractical for use in daily life. Textile-based wearable systems are a valuable alternative for unobtrusive movement monitoring. Textile-based wearables for knee angle monitoring have mostly been used for sagittal angle prediction, however, frontal knee angle measurement is more challenging. We investigated the design and performance of a smart garment for the detection of knee joint angles in three planes during different activities. \u0000Methods \u0000We equipped a pair of tight pants with four helical auxetic yarn capacitive strain sensors (Cuthbert et al., 2022) placed close to the knees. The exact positioning was optimized with an OMC study: markers were placed in potential sensor locations (Gholami et al., 2019) and the pairs of markers whose distance had the highest mutual information with knee angles were selected for sensor placement. A healthy participant performed walking and turning around, and knee ab/adduction activities wearing the sensorized prototype. The latter activity emphasized knee motion in the frontal and transverse planes. The capacitances from the sensors were recorded with a custom electronics board that transmitted data wirelessly to a smartphone. Multiple regression algorithms were implemented to predict knee angles from the strain sensors data, with the ground truth obtained from the OMC data recorded simultaneously during the experiments. \u0000Results \u0000The optimal sensor placements were above the kneecaps, orientated as the vastus medialis and the rectus femoris. Xgboost regression algorithm yielded best performance for walking with root mean square errors (RMSE) of 10.79°, 3.77°, and 2.49° for the sagittal, frontal, and transverse angles, respectively. Linear regression performed the best for knee ab/adduction with RMSEs of 8.96°, 6.33°, and 1.58° for the sagittal, frontal, and transverse angles (Fornaciari, 2023). \u0000Discussion/Conclusion \u0000The smart garment system was overall able to track the knee angle in three planes. The larger errors, compared with previous works (Gholami et al., 2019), reported for the walking and turning around movement are likely because of high variations in the movements of the participants during turning around. Additionally, the proposed system showed capability to monitor frontal and transverse angles with an average RMSE of 3.5°. The larger error values of the sagittal angles are likely because of higher range of motion in that plane. The proposed system allows for continuous and unobtrusive knee angle monitoring outside of the laboratory settings in the comfortable form factor of smart clothing. \u0000References \u0000Cuthbert, T. J., Hannigan, B. C., Roberjot, P., Shokurov, A. V., & Menon, C. (2022). HACS: Helical auxetic yarn capaciti","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"83 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139798854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and validation of an evaluation instrument for assessing the quality of teaching and learning in Swiss children’s and youth sports","authors":"Fabian Studer, Sara Seiler, Anna Siffert, L. C. Dapp, V. Gashaj, C. Herrmann","doi":"10.36950/2024.2ciss075","DOIUrl":"https://doi.org/10.36950/2024.2ciss075","url":null,"abstract":"Summary \u0000Youth and Sport (Y+S) constitutes Switzerland’s most extensive sports support system, encompassing over 90 sports within a state-subsidized and content-regulated training system. Upholding the quality of sports activities necessitates effective (appealing and high-quality) education for Y+S instructors. The Y+S education model transmits teaching content for high-quality Y+S activities through the “Teaching” domain of action, which closely aligns with contemporary instructional quality research. We developed the Y+S evaluation instrument to systematically evaluate this field of action in practical scenarios. This questionnaire digitally surveys children and youth participating in Y+S activities, employing items to assess four fields of action. \u0000We realized a nationwide quantitative validation study based on three qualitative pilot studies. Two surveys were administered to N = 1,230 (53.7% female; M = 13.99 years, SD = 2.36) and N = 851 (53.7% female; M = 13.96 years, SD = 2.18) children and youths. We conducted confirmatory factor analyses (CFA) to assess the factorial validity and reliability of the developed Y+S evaluation instrument. Following systematic item reduction, CFAs consistently demonstrated good model fits. All four fields of action with their 17 recommendations for action were represented by 51 items, attesting to the validity and reliability of the evaluation instrument. \u0000In conclusion, a validated evaluation instrument is now available in German, French, and Italian and will be implemented annually to assess Y+S activities in Switzerland moving forward.","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"253 6‐8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139799485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of pulse width and frequency on evoked responses in electrostimulation: comparison between three muscle groups","authors":"Timothée Popesco, Quentin Gardet, Jonathan Bossard, N. Maffiuletti, N. Place","doi":"10.36950/2024.2ciss022","DOIUrl":"https://doi.org/10.36950/2024.2ciss022","url":null,"abstract":"Introduction\u0000Neuromuscular electrical stimulation (NMES) is an innovative and effective (re)training strategy to improve or restore neuromuscular function (Maffiuletti et al., 2018). Contractions induced by NMES differ in many aspects from voluntary contractions, as motor unit (MU) recruitment is random, synchronous and spatially fixed (mostly superficial; Maffiuletti, 2010). Consequently, several limitations, such as higher fatigability (Vanderthommen et al., 1999) and discomfort (Delitto et al., 1992) might restrain its clinical implementation. The use of specific stimulation parameters may partly overcome these limitations. Indeed, the use of wide pulses (≥ 1 ms) delivered at low stimulation intensity leads to a preferential recruitment of Ia sensory axons (Veale et al., 1973) which may promote MU central (reflexive) recruitment. Furthermore, the high stimulation frequencies (> 80 Hz) would facilitate the temporal summation of post-synaptic excitatory potentials and reflexively activate spinal motoneurons through Ia afferents (Dideriksen et al., 2015), which may increase force production. Another potential advantage of wide pulse high frequency (WPHF) NMES is that low stimulation intensities are required to limit antidromic collision, and these lower intensities are associated with less discomfort (Delitto et al., 1992). Therefore, by stimulating at intensities expected to generate ~10% of the maximal voluntary contraction (MVC) force, WPHF NMES induces, in some individuals, a progressive increase in force during the stimulation, called ‘extra force’. It can reach up to 80% of the MVC force in plantar flexors (Neyroud et al., 2018) but the response to WPHF NMES in other muscle groups is less documented. Extra force is usually accompanied by a prolongation of the surface electromyographic (EMG) activity after cessation of the stimulation, also called ‘sustained EMG activity’ which is interpreted as MU recruited through the central pathway (Neyroud et al, 2018). The main aim of the present study was to explore the effect of varying stimulation parameters on the NMES-evoked force and sustained EMG activity in the plantar flexors, knee extensors and elbow flexors. It was hypothesized that the plantar flexors would show higher centrally-mediated responses to NMES than knee extensors and elbow flexors, especially with large pulse duration.\u0000Methods\u0000Sixteen volunteers, 2 women and 14 men (29 ± 6 yr, 177 ± 6 cm, 74 ± 11 kg) participated to three experimental sessions - one for each muscle group - in a randomized order. The experimental protocol was similar for the three muscle groups and included twelve 10-s NMES trains separated by at least 2 min of rest and delivered at an intensity set initially to evoke 10% of the maximal voluntary contraction force. Stimulation trains were randomly delivered with a combination of frequencies (20, 50, 100 and 147 Hz) and pulse durations (0.2, 1 and 2 ms). Force was collected using specific isometric ergometers and ","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"78 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139800453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Meaning in elite sport – A narrative review of scholarship in sport psychology","authors":"Violetta Oblinger-Peters, Kristoffer Henriksen, Noora J. Ronkainen","doi":"10.36950/2024.2ciss002","DOIUrl":"https://doi.org/10.36950/2024.2ciss002","url":null,"abstract":"Introduction\u0000Athletes’ heart-felt stories about their experiences in elite sport almost naturally evoke the notion of meaning. However, although various scholars and practitioners have suggested the concept of meaning to the sport psychology audience in the past two decades (e.g., Beckmann, 2023; Ravizza, 2002; Ronkainen & Nesti, 2020), its study in this discipline is still in the early stages compared to established psychological scholarship on the topic. To promote meaning as a complementary lens for research and applied work in sport psychology, the presentation aims to introduce the concept informed by psychological inquiry, and to synthesize and critically comment on the extant scholarship. For this, the wider meaning in life literature will be drawn on to give an overview of components, sources, pathways, and qualities of meaning and set it apart from the related concept of purpose.\u0000Methods\u0000A narrative review of 15 studies on meaning (n = 10) and purpose (n = 5) from elite sport contexts was conducted.\u0000Results\u0000The scholarship on meaning and purpose in elite sport revealed itself diverse in terms of employed study designs (quantitative, qualitative), methodologies and theoretical frameworks (e.g., narrative inquiry, phenomenology), conceptualizations of meaning and purpose (e.g., existential meaning, purpose in coaching), interpretations of meaning (intrapsychic or relational), and topics researched in relation to it (e.g., forced migration, injury experiences). To date the literature base on meaning and purpose in elite sport is characterized by fragmentation and largely imprecise use of the concept.\u0000Discussion/Conclusion\u0000To assist future empirical research and increase conceptual clarity of meaning in elite sport, sport psychology should integrate knowledge from its parent discipline psychology. Additionally, to make the somewhat abstract notion of meaning tangible for sport practitioners, more applied questions must be addressed. Through this, meaning could offer a truly holistic approach to well-being and mental health research and practice in sport. Importantly, “working” with meaning requires personal positioning, since conceiving of meaning as performance enhancement tool or as existential concern has major implications for how it is investigated and for how or whether it should be increased.\u0000References\u0000Beckmann, J. (2023). Meaning and meaninglessness in elite sport. In I. Nixdorf, R. Nixdorf, J. Beckmann, S. Martin, & T. Macintyre (Eds.), Routledge Handbook of Mental Health in Elite Sport (pp. 31–44). Routledge. https://doi.org/10.4324/9781003099345-5\u0000Ravizza, K. (2002). A philosophical construct: A framework for performance enhancement. International Journal of Sport Psychology, 33, 4–18. \u0000Ronkainen, N. J. & Nesti, M. S. (2019). Meaning and Spirituality in Sport and Exercise: Psychological Perspectives. Routledge. https://doi.org/10.4324/9781315102412","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139800620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The order of running shoes and how it influences the perception of effort and comfort","authors":"Kai Biedermann, Gian-Andri Baumann, Mattia Nolé, Christina M. Spengler, F. Beltrami","doi":"10.36950/2024.2ciss028","DOIUrl":"https://doi.org/10.36950/2024.2ciss028","url":null,"abstract":"Introduction\u0000High performance modern shoes reduce energy expenditure and improve performance, however, these gains may also stem from differences in perceived effort. Humans tend to weigh negative information more heavily than positive information, which could influence perception of effort when different shoes are tested sequentially. This study aimed to determine the existence of negativity bias on different measures of perception when alternating running shoes.\u0000Methods\u0000Eleven well-trained male athletes [age: 28 ± 6 years, weight: 68 ± 5 kg, height: 179 ± 5 cm, peak oxygen consumption: 65 ± 4 ml O2･kg-1･min-1] performed three lab visits: a familiarization day with an incremental test followed by two experimental days (track and treadmill, in balanced order). On each day, participants performed four sets of two 5-min runs at 16km･h-1 (5-min breaks in-between) alternating between On Cloudrunner (entry-level, EL) and Cloudboom Echo 3 (high-performance, HP). The order of the shoes was changed every set (i.e, EL-HP or HP-EL). After each run, participants reported their perception of effort (both on a 100-mm Visual Analog Scale [VAS] and on a 1-10 Borg Scale) and shoe comfort (VAS). Heart rate and gas exchange were monitored using a chest sensor and a metabolic cart. Differences in ratings between EL-HP and HP-EL were compared using paired t-tests.\u0000Results\u0000In combined data of track and treadmill, the physiological response and perception of effort were significantly lower while perception of comfort was significantly higher with HP compared to EL. On the treadmill, the absolute value of the change in perceived effort (VAS) was lower for EL-HP compared with HP-EL (0.6 ± 0.5 mm vs. 1.0 ± 0.7 mm, p = 0.013), but not on the track (EL-HP 0.5 ± 0.5 mm vs. HP-EL 0.6 ± 0.3 mm, p = 0.602). Absolute changes of effort (Borg) were neither affected by shoe order on the treadmill (EL-HP 0.7 ± 0.4 pts vs. HP-EL 0.8 ± 0.7 pts, p = 0.699) nor on the track (EL-HP 0.5 ± 0.4 pts vs. HP-EL 0.7 ± 0.6 pts, p = 0.452). Similarly, ratings of shoe comfort were neither affected by shoe order on the treadmill (EL-HP 1.8 ± 1.1 mm vs. HP-EL 1.4 ± 1.0 mm, p = 0.086) nor on the track (EL-HP 1.5 ± 1.1 mm vs. HP-EL 1.6 ± 1.0 mm, p = 0.674).\u0000Discussion/Conclusion\u0000Changes in perceived effort (VAS) assessed during treadmill running were nearly two times larger when switching from EL to HP than vice-versa, supporting the presence of a negativity bias in this specific condition, which could be related to the higher resolution of VAS scales compared with Borg. Possibly, the lack of negativity bias on the track resulted from an overall reduced rating of effort compared with treadmill, which left less room for differences. These findings suggest that it would be beneficial to include a control shoe worn before and between the tested shoes of interest to mitigate any potential negativity bias in tests when determining perceived effort on a treadmill with different shoes.","PeriodicalId":415194,"journal":{"name":"Current Issues in Sport Science (CISS)","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139801023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}