Journal of Human Kinetics最新文献

Habitual Running Style Matters: Duty Factor, and Not Stride Frequency, Relates to Loading Magnitude. 习惯性跑步方式很重要：负重系数，而非步频，与负荷大小有关。

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/191528

Lennert Van der Meulen, Senne Bonnaerens, Ine Van Caekenberghe, Dirk De Clercq, Veerle Segers, Pieter Fiers

{"title":"Habitual Running Style Matters: Duty Factor, and Not Stride Frequency, Relates to Loading Magnitude.","authors":"Lennert Van der Meulen, Senne Bonnaerens, Ine Van Caekenberghe, Dirk De Clercq, Veerle Segers, Pieter Fiers","doi":"10.5114/jhk/191528","DOIUrl":"10.5114/jhk/191528","url":null,"abstract":"Running style is temporally defined by a duty factor and stride frequency and believed to be related to the loading experienced during ever step. However, the exact relationship between both temporal variables and loading magnitude is still unknown. We aimed to identify the relationship between a duty factor and stride frequency with external load measures, joint reaction forces and joint moments. Thirty-one healthy female recreational runners ran across a 25-m runway at a speed of 2.30 ± 0.05 m·s-1. Ground reaction forces and motion capture data were used to determine the maximal vertical ground reaction force, the vertical instantaneous loading rate, peak braking force, peak joint extension moments and peak joint reaction forces at the knee and the ankle. The habitual duty factor and stride frequency of runners did not correlate with each other. The duty factor was found to be a significant predictor of maximal vertical ground reaction force (R2 = 0.585), peak braking force (R2 = 0.153), peak knee extension moment (R2 = 0.149), ankle plantar flexion moment (R2 = 0.225) and peak joint reaction forces at the knee (R2 = 0.591) and the ankle (R2 = 0.592), but not of the vertical instantaneous loading rate. Stride frequency had no significant predictive value. In conclusion, the maximal loading and potential injury risk of female recreational runners running with high duty factors are lower compared to those of peers running with lower duty factors.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"37-45"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571469/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increasing Braking and Amortization Forces during the Countermovement Jump Does Not Necessarily Improve Jump Height. 增加反向运动跳跃时的制动力和摊销力并不一定能提高跳跃高度。

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/190451

Daichi Nishiumi, Norikazu Hirose

{"title":"Increasing Braking and Amortization Forces during the Countermovement Jump Does Not Necessarily Improve Jump Height.","authors":"Daichi Nishiumi, Norikazu Hirose","doi":"10.5114/jhk/190451","DOIUrl":"10.5114/jhk/190451","url":null,"abstract":"This study aimed to investigate the acute effects of altering the braking rate of force development (B-RFD) and amortization force (Amf) during countermovement jumps (CMJs) on CMJ height. Nineteen healthy men and women with training experience participated, performing six CMJ variations at different velocities (preferred and fast) and depths (knee angles: 60°, 90°, and 120°). The measured variables included CMJ height, B-RFD, Amf, and impulses during the early and latter halves of the concentric phase (EI and LI, respectively). A two-way analysis of variance was employed, along with a correlational analysis of the rates of change for each variable. Significant velocity and depth effects were observed for B-RFD and Amf (p < 0.05). However, there was no significant velocity effect on CMJ height. No significant correlations were observed between the rates of change in B-RFD and Amf with CMJ height. Additionally, a high or a very high correlation (r ≥ 0.67) was observed between the rate of change in B-RFD and Amf with the rate of change in EI, while a moderate negative correlation (r = -0.43 to -0.53) was found between the rate of change in EI and LI. These findings suggest that improvements in B-RFD and Amf were associated with improvements in EI, while improvements in EI led to a reduction in LI, and consequently, improvements in B-RFD and Amf were not associated with an increase in CMJ height. In other words, improvements in B-RFD and Amf did not necessarily contribute to improvements in CMJ height.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"65-75"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571463/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effects of Combined Contrast Heat Cold Pressure Therapy on Post-Exercise Muscle Recovery in MMA Fighters: A Randomized Controlled Trial. 冷热联合压力疗法对综合格斗运动员运动后肌肉恢复的影响：随机对照试验

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/190220

Robert Trybulski, Aleksandra Żebrowska, Marta Bichowska-Pawęska, Adrian Kużdżał, Ireneusz Ryszkiel, Rui Miguel Silva, Jarosław Muracki, Adam Kawczyński

{"title":"The Effects of Combined Contrast Heat Cold Pressure Therapy on Post-Exercise Muscle Recovery in MMA Fighters: A Randomized Controlled Trial.","authors":"Robert Trybulski, Aleksandra Żebrowska, Marta Bichowska-Pawęska, Adrian Kużdżał, Ireneusz Ryszkiel, Rui Miguel Silva, Jarosław Muracki, Adam Kawczyński","doi":"10.5114/jhk/190220","DOIUrl":"10.5114/jhk/190220","url":null,"abstract":"The purpose of this study was to evaluate the effects of contrast heat and cold pressure therapy (CHCP) on muscle tone, elasticity, stiffness, perfusion unit, and muscle fatigue indices after plyometric training consisting of five sets of jumping on a 50-cm high box until exhaustion. A prospective, randomized, controlled single-blind study design was used. Twenty professional MMA fighters were included in the study. The experimental group (n = 10) was subjected to the CHCP protocol (eGR), while the control group (cGR) (n = 10) was subjected to sham therapy. Both protocols consisted of three CHCP sessions performed immediately after plyometric exercise, 24 and 48 h afterwards. Measurements were taken at the following time points: 1) at rest; 2) 1 min post-exercise; 3) 1 min post-CHCP therapy; 4) 24 h post-CHCP therapy; 5) 48 h post-CHCP therapy. The results of the eGR compared to the cGR showed significantly higher perfusion at time point 5 (p < 0.001), higher muscle tone at time points 1, and 3-5 (p < 0.001 for all), higher stiffness at time points 1, 3-5 (p < 0.001 for all) and a higher pain threshold at time points 1 and 5 (p < 0.001 for all). This study suggests a positive effect of CHCP therapy on muscle biomechanics, the pain threshold, and tissue perfusion, which may contribute to increasing the effectiveness of post-exercise muscle recovery in MMA athletes.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"127-146"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571465/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the TTN C > T Polymorphism on Selected Variables of Aerobic and Anaerobic Capacity after a 12-Week Training Program. 12 周训练后 TTN C > T 多态性对有氧和无氧能力某些变量的影响

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/191847

Agata Leońska-Duniec, Ewelina Maculewicz, Myosotis Massidda, Maciej Buryta, Andrzej Mastalerz, Paweł Cięszczyk

{"title":"Impact of the TTN C > T Polymorphism on Selected Variables of Aerobic and Anaerobic Capacity after a 12-Week Training Program.","authors":"Agata Leońska-Duniec, Ewelina Maculewicz, Myosotis Massidda, Maciej Buryta, Andrzej Mastalerz, Paweł Cięszczyk","doi":"10.5114/jhk/191847","DOIUrl":"10.5114/jhk/191847","url":null,"abstract":"The TTN gene encodes a large muscle protein called titin, which provides structure, stability, and flexibility to skeletal and cardiac sarcomeres. The aim of this study was to determine whether the TTN C > T polymorphism (rs10497520) influenced training-induced changes in selected variables of aerobic and anaerobic capacity. We studied genotypes distribution in a group of 156 Caucasian females examined for aerobic capacity evaluated by maximal oxygen uptake (VO2max), and anaerobic capacity measured with the Wingate anaerobic test, before and after a 12-week training program. The most important finding was a genotype by training interaction for anaerobic capacity (AnC) during the Wingate test (p = 0.003). In response to training, carriers of the CT and TT genotypes demonstrated a significant increase in the total amount of work accomplished. We also showed that the applied training program improved all the Wingate test variables in the CT + TT genotype group by 10%. The obtained results suggest that the CT and TT genotypes may enhance anaerobic power and anaerobic capacity changes induced by regular training. We also suggest that T allele carriers may possess a metabolic adaptive advantage towards the anaerobic metabolism. Thus, the TTN gene may be considered a promising marker used in sports science, underlying variability in achieving sporting goals in events where the anaerobic energy system predominates.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"117-125"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571456/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poor Joint Work in the Lower Limbs during a Tennis Forehand Groundstroke after a Cross-Over Step Inhibits an Increase in the Racket Speed. 网球正手落地击球时，交叉步后下肢关节工作不畅，抑制了球拍速度的提高。

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/186535

Yuta Kawamoto, Takahito Suzuki, Yoichi Iino, Shinsuke Yoshioka, Daisuke Takeshita, Fukashiro Senshi

{"title":"Poor Joint Work in the Lower Limbs during a Tennis Forehand Groundstroke after a Cross-Over Step Inhibits an Increase in the Racket Speed.","authors":"Yuta Kawamoto, Takahito Suzuki, Yoichi Iino, Shinsuke Yoshioka, Daisuke Takeshita, Fukashiro Senshi","doi":"10.5114/jhk/186535","DOIUrl":"10.5114/jhk/186535","url":null,"abstract":"A forward run-up and stepping are used to accelerate hitting tools or throwing objects in sports. This study aimed to investigate the effect of a forward cross-over step on the speed of a hitting tool by analyzing the joint work and mechanical energy of the whole body and the hitting tool using inverse dynamics. Thirteen advanced tennis players performed forehand groundstrokes at maximum effort with and without a forward cross-over step. From the whole body plus racket perspective, the body-weight-normalized mechanical energy at the start of the hitting motion increased by 1.74 ± 0.42 J·kg-1 due to the cross-over step. However, the increase in the magnitude of total negative joint work, primarily attributed to the lower limbs, was 1.38 ± 0.31 J·kg-1 due to the cross-over step, conventionally regarded as energy absorption. Consequently, the mechanical energy of the whole body plus the racket at ball impact was comparable between the conditions. Nevertheless, from the segmental perspective, the mechanical work performed by the net shoulder joint force of the playing upper limb with the cross-over step during the hitting motion was greater than that without the cross-over step. Subsequently, the slight increase in the mechanical energy of the playing upper limb plus racket (0.25 ± 0.21 J·kg-1) resulted in increased racket speed (4.3%). Considering the comparable total mechanical energy and a resultant increase in racket speed, players and coaches should not overestimate the effect of the forward step on racket speed.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"77-90"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571468/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Evaluation of the Modified Wave Periodization Model Efficiency on the Example of Young Soccer Players' Sprint Tests. 以青少年足球运动员的短跑测试为例，评估改良波浪周期模型的效率。

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/191699

Marta Szymanek-Pilarczyk, Michał Jakub Nowak, Tomasz Góra, Łukasz Oleksy, Miłosz Drozd, Jacek Wąsik

{"title":"The Evaluation of the Modified Wave Periodization Model Efficiency on the Example of Young Soccer Players' Sprint Tests.","authors":"Marta Szymanek-Pilarczyk, Michał Jakub Nowak, Tomasz Góra, Łukasz Oleksy, Miłosz Drozd, Jacek Wąsik","doi":"10.5114/jhk/191699","DOIUrl":"10.5114/jhk/191699","url":null,"abstract":"The research aimed to evaluate the modified model of wave periodization efficiency in running speed tests conducted among soccer players aged 12 to 16. Participants included prospective players of a leading Polish top league soccer club. The research was carried out from 2018 to 2022 in June (Testing A) and December (Testing B) of each year. The test involved 30-m straight line running with 5-, 10-, and 30-m split time measurements. For this purpose, electronic photocells were used (FITLIGHT, Canada). The six-month training intervention increased the athletes' speed as there was a considerable decrease in the running time over the distance of 5 m (F = 7.86; p < 0.001), 10 m (F = 73.99; p < 0.001) and 30 m (F = 127.55; p < 0.001). Analysis of running performance of young soccer players aged 12-16 showed a significant improvement in speed at distances of 5, 10 and 30 m, confirming training effectiveness based on the wave periodization model. The negative correlation between testing year and performance suggests the influence of biological development on players' speed. The COVID-19 pandemic has impacted training, which was reflected in reduced differences between test scores. Improving initial running technique can contribute to better match results, which emphasizes the need for an individual approach to the physical preparation of players.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"215-226"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571460/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Protective Mat Thickness on the Upper Limb Strike Force Simulation in Combat Sports and Self Defense. 防护垫厚度对搏击运动和自卫中上肢打击力模拟的影响。

IF 1.9 3区医学

Journal of Human Kinetics Pub Date : 2024-09-26 eCollection Date: 2024-10-01 DOI: 10.5114/jhk/192131

Vaclav Beranek, Petr Stastny, Bogdan Bacik, Tomasz Bonkowski, Vit Novacek

{"title":"The Effect of Protective Mat Thickness on the Upper Limb Strike Force Simulation in Combat Sports and Self Defense.","authors":"Vaclav Beranek, Petr Stastny, Bogdan Bacik, Tomasz Bonkowski, Vit Novacek","doi":"10.5114/jhk/192131","DOIUrl":"10.5114/jhk/192131","url":null,"abstract":"The strike force in combat sports strongly depends on the protective material's mechanical properties and energy absorption capacity. Therefore, this study aimed to estimate the effect of the protective layer thickness and repeated loading on the net force in a falling weight impact test. A falling 8-kg weight dropped from 15 cm, 25 cm, and 50 cm was used to simulate impact peak forces in an upper limb strike. Transfer linear regression functions were identified for three layers of different thickness (1.8 cm, 3.6 cm, and 5.4 cm) between the measured force and undamped force that would be measured if no protective layer was used. A decrease in damping performance under repetitive loading was assessed for the same amount of energy (30 J) absorbed by the specimens. There were 36 specimens examined in 126 tests. When the measuring apparatus was covered with one, two or three layers of Trocellen foam, the undamped force was approximately 2.8, 6.1, and 11.1 times higher, respectively (p < 0.05, R2 ≥ 0.95), than the force measured in the kinetic design. This allows researchers to select the number of layers according to the individual needs in terms of safety and injury prevention. A single layer of Trocellen foam used in this study may be insufficient to ensure the safety of athletes in upper limb strike experiments due to possible compaction of the foam structure for deformations exceeding 80% compression and forces exceeding 5 kN, although no injury was previously observed.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"94 ","pages":"47-63"},"PeriodicalIF":1.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571458/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142675933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Not Only Protein: Dietary Supplements to Optimize the Skeletal Muscle Growth Response to Resistance Training: The Current State of Knowledge. 不仅是蛋白质：膳食补充剂优化骨骼肌生长对阻力训练的反应：知识现状》。

IF 2.3 3区医学

Journal of Human Kinetics Pub Date : 2024-04-15 eCollection Date: 2024-03-01 DOI: 10.5114/jhk/18666

Antonio Paoli, Giuseppe Cerullo, Antonino Bianco, Marco Neri, Federico Gennaro, Davide Charrier, Tatiana Moro

{"title":"Not Only Protein: Dietary Supplements to Optimize the Skeletal Muscle Growth Response to Resistance Training: The Current State of Knowledge.","authors":"Antonio Paoli, Giuseppe Cerullo, Antonino Bianco, Marco Neri, Federico Gennaro, Davide Charrier, Tatiana Moro","doi":"10.5114/jhk/18666","DOIUrl":"https://doi.org/10.5114/jhk/18666","url":null,"abstract":"Regarding skeletal muscle hypertrophy, resistance training and nutrition, the most often discussed and proposed supplements include proteins. Although, the correct amount, quality, and daily distribution of proteins is of paramount importance for skeletal muscle hypertrophy, there are many other nutritional supplements that can help and support the physiological response of skeletal muscle to resistance training in terms of muscle hypertrophy. A healthy muscle environment and a correct whole muscle metabolism response to the stress of training is a prerequisite for the increase in muscle protein synthesis and, therefore, muscle hypertrophy. In this review, we discuss the role of different nutritional supplements such as carbohydrates, vitamins, minerals, creatine, omega-3, polyphenols, and probiotics as a support and complementary factors to the main supplement i.e., protein. The different mechanisms are discussed in the light of recent evidence.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"91 Spec","pages":"225-244"},"PeriodicalIF":2.3,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11057611/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140863242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stroke-Specific Swimming Critical Speed Testing: Balancing Feasibility and Scientific Rigour. 特定泳姿临界速度测试：平衡可行性与科学严谨性。

IF 2.3 3区医学

Journal of Human Kinetics Pub Date : 2023-11-28 eCollection Date: 2024-01-01 DOI: 10.5114/jhk/170882

Ben E Scott, Richard Burden, Jeanne Dekerle

{"title":"Stroke-Specific Swimming Critical Speed Testing: Balancing Feasibility and Scientific Rigour.","authors":"Ben E Scott, Richard Burden, Jeanne Dekerle","doi":"10.5114/jhk/170882","DOIUrl":"10.5114/jhk/170882","url":null,"abstract":"This study aimed to assess the reliability of a two-distance critical speed protocol in the specialist strokes of national-level swimmers and understand the practical feasibility of extending the protocol to increase its validity. Thirty-two national-level swimmers (butterfly n = 7; backstroke n = 8; breaststroke n = 7; front crawl n = 10) swum three 200-m and three 400-m performance trials over a three-week period. Critical speed and supra-critical speed distance capacity were computed from the linear modelling of the distance-time relationship. Swimmers were subsequently asked whether they felt they could or would want to complete an 800-m trial as part of a three-distance critical speed protocol to enhance validity. Both 200-m and 400-m performances (coefficient of variation of < 2%) and derived critical speed (typical error of ≤ 0.04 m·s-1; coefficient of variation of < 4%) were reliable for all strokes, while supra-critical speed distance capacity (typical error from 4 to 9 m; coefficient of variation from 13 to 45%) was not reliable. Response rates to the follow-up questions were 100%. Few butterfly swimmers said they felt they could complete an 800-m performance trial (39%), with more positive responses for breaststroke (71%), backstroke (100%), and front crawl swimmers (100%). Butterfly swimmers were significantly less likely to say they could or would want to complete an 800-m trial than backstroke and front crawl swimmers (p < 0.05). Including a third distance 800-m trial to increase critical speed validity would not be acceptable to butterfly swimmers, would be challenging to breaststroke swimmers, but would be acceptable to front crawl and backstroke swimmers.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"90 ","pages":"239-251"},"PeriodicalIF":2.3,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10875687/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139912814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Concurrent-Validity and Reliability of Photocells in Sport: A Systematic Review. 体育运动中光电传感器的并发有效性和可靠性：系统回顾。

IF 2.3 3区医学

Journal of Human Kinetics Pub Date : 2023-11-28 eCollection Date: 2024-04-01 DOI: 10.5114/jhk/174285

Weilhelmn Multhuaptff, Eneko Fernández-Peña, Adrián Moreno-Villanueva, Alejandro Soler-López, Markel Rico-González, Filipe Manuel Clemente, Sergio Bravo-Cucci, José Pino-Ortega

{"title":"Concurrent-Validity and Reliability of Photocells in Sport: A Systematic Review.","authors":"Weilhelmn Multhuaptff, Eneko Fernández-Peña, Adrián Moreno-Villanueva, Alejandro Soler-López, Markel Rico-González, Filipe Manuel Clemente, Sergio Bravo-Cucci, José Pino-Ortega","doi":"10.5114/jhk/174285","DOIUrl":"10.5114/jhk/174285","url":null,"abstract":"Specific physical qualities such as sprint running, change-of-direction or jump height are determinants of sports performance. Photocell systems are practical and easy to use systems to assess the time from point A to point B. In addition, these photoelectric systems are also used to obtain the time of vertically displaced movements. Knowing the accuracy and precision of photocell timing can be a determinant of ensuring a higher quality interpretation of results and of selecting the most appropriate devices for specific objectives. This systematic review aimed to identify and summarize studies that have examined the validity and reliability of photocells in sport sciences. A systematic review of PubMed, SPORTDiscus, and Web of Science databases was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. From the 164 studies initially identified, 16 were fully reviewed, and their outcome measures were extracted and analyzed. Photocells appear to have a strong agreement with force plates (gold standard), but are not interchangeable to measure the vertical jump. For monitoring horizontal displacement, double beam systems, compared to single beam systems, are more valid and reliable when it comes to avoiding false triggers caused by swinging arms or legs.","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"92 ","pages":"53-71"},"PeriodicalIF":2.3,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11079923/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140912511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0