Journal of sports science & medicine最新文献

{"title":"Influence of Perceived Physical Literacy on Coaching Efficacy and Leadership Behavior: A Cross-Sectional Study.","authors":"Ming-Hui Li,&nbsp;Raymond Kim Wai Sum,&nbsp;Tristan Wallhead,&nbsp;Amy Sau Ching Ha,&nbsp;Cindy Hui Ping Sit,&nbsp;Ru Li","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The concept of physical literacy has evolved to work as a guiding ideology in physical education, physical activity and heath, while little is known for coaching context. The purpose of this study was to examine the influence of perceived physical literacy (PPL) in predicting coaching efficacy and leadership behavior from the perceptions of student-athletes in Hong Kong secondary schools. A total of 352 (200 boys, 152 girls) student-athletes (14.78 ± 1.73 years old) participated in this study. Perceived Physical Literacy Instrument (PPLI) for adolescents, Coaching Efficacy Scale (CES) and Leadership Scale for Sport (LSS) for student-athletes were adopted to assess the student-athletes' self-reported PL, perceptions of coaching efficacy and leadership behavior, respectively. Hierarchical linear regressions revealed that student-athletes' knowledge and understanding of physical literacy significantly predicted all the dimensions of coaching efficacy (18%-23%, p<0.01) and leadership behavior (15%-27%, p < 0.05) except for autocratic behavior after controlling for the effects of demographic variables (such as age, gender, and training experience). The PPL attribute of Sense of Self and Self-confidence also demonstrated significant predictions with coaching efficacy (17%-19%, p < 0.01), while the PPL attribute of Self-expression and Communication with others only significantly predicted social support behavior (14%, p < 0.05). Path analysis showed PPL of student-athletes has significant predictions to their perceptions of coaches' leadership and this relationship was partially mediated by their perceptions of coaching efficacy (β = 0.57). Discussion highlights that this study is the first empirical study to explore PPL in the coaching context and its strength in predicting coaching effectiveness. The study provides a new perspective for coaching education programs or coach-oriented interventions by emphasizing the concept of physical literacy.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"82-90"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370958/pdf/jssm-18-82.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comparison of the Maximal Fat Oxidation Rates of Three Different Time Periods in The Fatmax Stage.","authors":"Kerem T Özgünen,&nbsp;Çiğdem Özdemir,&nbsp;Selcen Korkmaz-Eryılmaz,&nbsp;Abdullah Kılcı,&nbsp;Özgür Günaştı,&nbsp;Sanlı S Kurdak","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>This study aimed to compare the maximal fat oxidation (MFO) rates obtained from the stage average, last 2 min average, and highest value in the Fatmax stage determined with a 6 min step protocol. A total of 35 overweight, sedentary healthy men (age: 25.4 ± 0.7 years, body mass index: 26.0 ± 0.6 kg/m²) participated in the study. Substrate oxidation was calculated using breath-by-breath gas exchange data for each stage. When the change in the fat oxidation rate for every min throughout the Fatmax stage was evaluated, the average value of the 4^th min was significantly lower than that of the 2^nd and 3^rd min (p < 0.01). In addition, the 5^th and 6^th min fat oxidation rates were significantly lower than the rates of the 1^st, 2^nd, 3^rd, and 4^th min (0.30 ± 0.01 and 0.29 ± 0.01 g/min for the 5^th and 6^th min, respectively, vs. 0.35 ± 0.02, 0.34 ± 0.02, 0.33 ± 0.02, and 0.31 ± 0.01 g/min for the 1^st, 2^nd, 3^rd, and 4^th min, respectively; p < 0.01). Most of the participants had MFO rates in the 1^st min of the stage (16/35 participants), and the MFO rates of the remaining participants were observed in the 2^nd, 3^rd, and 4^th min (7/35, 4/35, and 8/35 participants, respectively). None of the participants had MFO rates in the 5^th or 6^th min. The individual MFO rate (highest fat oxidation rate during Fatmax) was significantly higher than the fat oxidation rate calculated with the last 2 min average values (0.36 ± 0.02 and 0.30 ± 0.01 g/min, respectively; p < 0.05). In conclusion, the calculation of the fat oxidation rate by averaging the last portion of the Fatmax stage data may cause the underestimation of the MFO rate, which probably occurs earlier in the Fatmax stage.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"44-51"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370962/pdf/jssm-18-44.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Foam Rolling and Joint Distraction with Elastic Band Training Performed for 5-7 Weeks Respectively Improve Lower Limb Flexibility.","authors":"Aymeric Guillot,&nbsp;Yann Kerautret,&nbsp;Florian Queyrel,&nbsp;William Schobb,&nbsp;Franck Di Rienzo","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Both foam rolling and joint distraction training with elastic bands are very popular interventions designed to improve muscular function, motor performance, and joint range of motion, as well as to reduce feeling of fatigue and delayed onset of muscle soreness. The heterogeneity of methods used among studies however prevents from drawing firm conclusions about the optimal content of pre/post interventions. The present study aims at answering the following questions: <i>i)</i> Do foam rolling and joint distraction with elastic band training improve joint range of motion in national rugby players? <i>ii)</i> Do short and long rolling durations have similar effects on range of motion? In a first experiment, we compared ankle, knee, and hip flexibility scores in 30 national rugby players after a 7-week foam rolling training program involving either a short (20s) or long (40s) rolling duration. Data revealed that foam rolling substantially improved all range of motion scores, regardless the rolling duration (performance gains ranged from 9 to 18° in the foam rolling groups, i.e. 8 to 20% increase, but remained under 2° in the control group). In a second experiment, we investigated the effect of a 5-week joint distraction with elastic band training program on hamstring and adductor range of motion in 23 national rugby players. Data showed that elastic band training significantly improved sit-and-reach (29.16% increase, p = 0.01) as well as side split (2.31% increase, p < 0.001) stretching performances. Taken together, present findings confirm that both foam rolling and joint distraction exercises with elastic bands are likely to enhance joint range of motion and specific mobility patterns during sport performance, and further serve prophylaxis. Such effects therefore constitute a promising avenue for clinical, home therapy, and personal flexibility training.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"160-171"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370967/pdf/jssm-18-160.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36976000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Proportion of Lower Limb Running Injuries by Gender, Anatomical Location and Specific Pathology: A Systematic Review.","authors":"Peter Francis,&nbsp;Chris Whatman,&nbsp;Kelly Sheerin,&nbsp;Patria Hume,&nbsp;Mark I Johnson","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Running is associated with a higher risk of overuse injury than other forms of aerobic exercise such as walking, swimming and cycling. An accurate description of the proportion of running injuries per anatomical location and where possible, per specific pathology, for both genders is required. The aim of this review was to determine the proportion of lower limb running injuries by anatomical location and by specific pathology in male and female runners (≥800m - ≤ marathon). The preferred reporting items for systematic reviews and meta-analyses guidelines were followed for this review. A literature search was performed with no restriction on publication year in Web of Science, Scopus, Sport-Discus, PubMed, and CINAHL up to July 2017. Retrospective, cross-sectional, prospective and randomised-controlled studies which surveyed injury data in runners were included. 36 studies were included to report the overall proportion of injury per anatomical location. The overall proportion of injury by specific pathology was reported from 11 studies. The knee (28%), ankle-foot (26%) and shank (16%) accounted for the highest proportion of injury in male and female runners, although the proportion of knee injury was greater in women (40% <i>vs.</i> 31%). Relative to women, men had a greater proportion of ankle-foot (26% <i>vs.</i> 19%) and shank (21% <i>vs.</i> 16%) injuries. Patellofemoral pain syndrome (PFPS; 17%), Achilles tendinopathy (AT; 10%) and medial tibial stress syndrome (MTS; 8%) accounted for the highest proportion of specific pathologies recorded overall. There was insufficient data to sub-divide specific pathology between genders. The predominate injury in female runners is to the knee. Male runners have a more even distribution of injury between the knee, shank and ankle-foot complex. There are several methodological issues, which limit the interpretation of epidemiological data in running injury.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"21-31"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370968/pdf/jssm-18-21.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Quadriceps and Hamstring Muscle Activity during an Isometric Squat between Strength-Matched Men and Women.","authors":"Sophia Nimphius,&nbsp;Jeffrey M McBride,&nbsp;Paige E Rice,&nbsp;Courtney L Goodman-Capps,&nbsp;Christopher R Capps","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The primary purpose of this investigation was to determine whether strength-matched men and women exhibit a different magnitude and ratio of leg muscle activity during a maximal voluntary isometric squat. The secondary purpose was to assess the effect of normalization method on differences in strength between men and women. Thirty-two men (n = 16) and women (n = 16) were successfully strength-matched (≤10% difference) by maximal force produced during an isometric squat (IS) when normalized to body weight. Subjects first performed a maximal isometric knee extension (IKE) and knee flexion (IKF) followed by the IS and muscle activity (EMG_max) was recorded for the vastus medialis (VMO), vastus lateralis (VL), semitendinosus (ST) and biceps femoris (BF). Muscle activity during the IS was expressed relative to the maximums observed during the IKE and IKF (%EMG_max). The results indicate that VMO, VL, ST and BF %EMG_max were not significantly different (<i>p</i> > 0.05) between men and women during the IS (Men VMO = 136.7 ± 24.9%, Women VMO = 157.1 ± 59.8%, Men VL = 126.2 ± 38.2%, Women VL = 128.1 ± 35.5%, Men ST = 25.5 ± 13.6%, Women ST = 25.2 ± 21.8%, Men BF = 46.1 ± 26.0%, Women BF = 42.2 ± 24.8%). Furthermore, the VMO:VL and hamstring to quadriceps (H:Q) %EMG_max ratio were not significantly different between groups in the IS (Men VMO:VL = 1.15 ± 0.28, Women VMO:VL = 1.22 ± 0.26, Men H:Q = 0.28 ± 0.14, Women H:Q = 0.24 ± 0.20). This investigation indicates that the magnitude of muscle activity and the ratios examined are not significantly different between men and women in a maximal voluntary isometric squat when matched for normalized strength. Future investigations should consider subject strength and normalization procedures in the experimental design to elucidate possible sex differences in neuromuscular performance capabilities.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"101-108"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370970/pdf/jssm-18-101.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are Linear Speed and Jumping Ability Determinants of Change of Direction Movements in Young Male Soccer Players?","authors":"Marek Popowczak,&nbsp;Andrzej Rokita,&nbsp;Kamil Świerzko,&nbsp;Stefan Szczepan,&nbsp;Ryszard Michalski,&nbsp;Krzysztof Maćkała","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The study was undertaken to investigate the relationships between linear speed, change of direction, and explosive power in the lower limbs of young soccer players. We aimed to determine the variables associated with effective change-of-direction speeds (time) based on the 30-m ZigZag (cutting maneuver) under 60° (CODS¹), and 30 m sprint divided into forward-backward-forward movement (CODS²). Sixty young soccer players (age: 17.4 ± 0.7 years, height: 1.76 ± 0.06 m, weight: 68.1 ± 8.9 kg) from soccer sport clubs were included. The participants performed 30-m change-of-direction sprints and 30-m backward and forward sprints. For the maximum speed evaluation, a straight-line 30-m sprint test was performed. Counter-movement jumps and standing broad jumps were used to assess jumping ability. Pearson's linear correlation and a multiple stepwise linear regression model were used to adjust for variations related to the influence of functional speed and explosive power variables, which were analyzed based on the CODS¹ and CODS² data. Our results showed that 30-m CODS² and standing broad jumps were associated with CODS¹. The variation for the 30-m change-of-direction maneuvers under 60° could be explained by the results of 30-m forward-backward-forward change-of-direction. The standing broad jump explained 10% variation for the performances in change-of-direction sprint decrements and 9% variation for the 5-m change-of-direction with the best times, whereas straight-line sprinting was related to forward-backward-forward change-of-direction. The 10-m sprint explained 50% variation of the performances in the first 10-m forward running in the CODS² and 12% variation for 10-m backward-forward change-of-direction. The 30-m sprint explained 36% variation for 30-m forward-backward-forward change-of-direction. The 30-m sprint and overall body mass also explained 58% variation for 10-m forward-backward change-of-direction. For coaching purposes, we report that forward-backward-forward and cutting maneuver change-of-direction movements are independent and highly useful skills. This information can help to provide better training prescriptions.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"109-117"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370957/pdf/jssm-18-109.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alteration of Autophagy Gene Expression by Different Intensity of Exercise in Gastrocnemius and Soleus Muscles of Wistar Rats.","authors":"Vita Murniati Tarawan,&nbsp;Julia Windi Gunadi,&nbsp;Setiawan,&nbsp;Ronny Lesmana,&nbsp;Hanna Goenawan,&nbsp;Debby Eka Meilina,&nbsp;Julidea Anggiriani Sipayung,&nbsp;Teresa Liliana Wargasetia,&nbsp;Wahyu Widowati,&nbsp;Yenni Limyati,&nbsp;Unang Supratman","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Exercise-induced skeletal muscle adaptation requires degradation of cellular components carried out by autophagy. However, the alteration of autophagy by different intensity of exercise in skeletal muscle is still unknown. In the present study, we investigate whether low, moderate, and high-intensity exercises have different impacts on autophagy gene expression in gastrocnemius and soleus muscles of wistar rats. This work is limited because only rats are used, and does not cover human tissues. Twenty male wistar rats were assigned to four groups: sedentary control, low-intensity (LI, 10 m/minute), moderate-intensity (MI, 20 m/minute), and high-intensity (HI, 30 m/minute) exercises. Training was conducted 30 minutes/day with a 5 times/week interval for 8 weeks. RNA and protein were extracted from gastrocnemius and soleus muscles then stored in -80°C. Specific primers and antibodies for autophagy genes and protein levels were utilized for semi-quantitative PCR and Western Blot. Exercises decrease expression of autophagy gene LC3 (LI and MI 0.7 fold, HI 0.8 fold, p < 0.05) in gastrocnemius muscles and soleus muscle (LI, MI, and HI 0.8 fold, p < 0.05) compared to control. On the other side, we observed p62 gene expression decreased in gastrocnemius (0.8 fold, p < 0.05) and soleus (0.9 fold, p < 0.05) muscles with MI, but increased in soleus (1.1 fold, p < 0.05) muscles with HI. This result is consistent with the change of protein level, suggesting that autophagy might be modulated by different type of exercise. This study suggests that intensity of exercise and different type of muscle fibers effect autophagy gene expression in skeletal muscle of wistar rats. MI exercise increases autophagy gene expression in gastrocnemius and soleus muscles, but HI exercise decreases autophagy gene expression in soleus muscles of wistar rats. Soleus muscles are more responsive to exercise compared to gastrocnemius muscles.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"146-154"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370963/pdf/jssm-18-146.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36975562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physiological and Psychological Responses during Low-Volume High-Intensity Interval Training Sessions with Different Work-Recovery Durations.","authors":"Luiz Fernando Farias-Junior,&nbsp;Geovani Araújo Dantas Macêdo,&nbsp;Rodrigo Alberto Vieira Browne,&nbsp;Yuri Alberto Freire,&nbsp;Filipe Fernandes Oliveira-Dantas,&nbsp;Daniel Schwade,&nbsp;Arnaldo Luis Mortatti,&nbsp;Tony Meireles Santos,&nbsp;Eduardo Caldas Costa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We compared physiological and psychological responses between low-volume high-intensity interval training (LV-HIIT) sessions with different work-recovery durations. Ten adult males performed two LV-HIIT sessions in a randomized, counter-balanced order. Specifically, 60/60 s LV-HIIT and 30/30 s LV-HIIT. Oxygen uptake (VO₂), carbon dioxide output (VCO₂), ventilation (VE), respiratory exchange ratio (RER), perceived exertion (RPE), and affect were assessed. During intervals, the VO₂ (3.25 ± 0.57 vs. 2.83 ± 0.50 L/min), VCO₂ (3.15 ± 0.61 vs. 2.93 ± 0.58 L/min), VE (108.59 ± 27.39 vs. 94.28 ± 24.98 L/min), and RPE (15.9 ± 1.5 vs. 13.9 ± 1.5) were higher (ps ≤ 0.01), while RER (0.98 ± 0.05 vs. 1.03 ± 0.03) and affect (-0.8 ± 1.4 vs. 1.1 ± 2.0) were lower (ps ≤ 0.007) in the 60/60 s LV-HIIT. During recovery periods, VO₂ (1.85 ± 0.27 vs. 2.38 ± 0.46 L/min), VCO₂ (2.15 ± 0.35 vs. 2.44 ± 0.45 L/min), and affect (0.6 ± 1.7 vs. 1.7 ± 1.8) were lower (ps ≤ 0.02), while RER (1.20 ± 0.05 vs. 1.03 ± 0.05; p < 0.001) was higher in the 60/60 s LV-HIIT. Shorter LV-HIIT (30 s) elicits lower physiological response and attenuated negative affect than longer LV-HIIT (60 s).</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"181-190"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370955/pdf/jssm-18-181.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36976002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Functional Mobility and Dynamic Postural Control Predict Overhead Handball Throwing Performance in Elite Female Team Handball Players.","authors":"Ola Eriksrud,&nbsp;Fredrik O Sæland,&nbsp;Peter A Federolf,&nbsp;Jan Cabri","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The relationship between dynamic postural control, functional mobility and team handball throwing performance, velocity and accuracy, is largely unknown. The hand reach star excursion balance test (HSEBT) is a full kinetic chain assessment tool of these factors. Specifically, L135 and R135 (extension) reaches elicit joint movement combinations similar to the cocking and acceleration phase, while the L45 and R45 (flexion) reaches elicit joint movement combinations similar to the follow-through. The purpose of this study was to determine if specific HSEBT reach measures correlate with team handball throwing performance. Eleven elite female team handball players (21.7 ± 1.8 years; 71.3 ± 9.6 kg; 1.75 ± 0.07 m) executed selected HSEBT reaches before performing five valid step-up overhead throws (1x1m target) from which throwing velocity (motion capture) and accuracy (mean radial error) were quantified. Significant relationships between HSEBT measures and mean radial error, but not throwing velocity were established. Specifically, extension composite scores (L135+R135) for the dominant (150.7 ± 17.4cm) and non-dominant foot (148.1 ± 17.5 cm) were correlated with mean radial error (p < 0.05). Also, specific reaches on the dominant (L135: 87.4 ± 5.6 cm; R135: 63.4 ± 11.8 cm) and non-dominant (R135: 87.0 ± 6.1 cm) foot were correlated with throwing error (p < 0.05). The lack of significant findings to throwing velocity might be due to a ceiling effect of both L135 and R135 and of throwing velocity. We conclude that while there may be other reasons for handball players to train and test functional mobility and dynamic postural control as measured in the HSEBT, no beneficial effect on throwing performance should be expected in an elite group of handball players.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"91-100"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370954/pdf/jssm-18-91.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36984457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Are <i>IL1B, IL6</i> and <i>IL6R</i> Gene Variants Associated with Anterior Cruciate Ligament Rupture Susceptibility?","authors":"Ewelina Lulińska-Kuklik,&nbsp;Ewelina Maculewicz,&nbsp;Waldemar Moska,&nbsp;Krzysztof Ficek,&nbsp;Mariusz Kaczmarczyk,&nbsp;Monika Michałowska-Sawczyn,&nbsp;Kinga Humińska-Lisowska,&nbsp;Maciej Buryta,&nbsp;Jakub Chycki,&nbsp;Pawel Cięszczyk,&nbsp;Piotr Żmijewski,&nbsp;Agata Rzeszutko,&nbsp;Marek Sawczuk,&nbsp;Petr Stastny,&nbsp;Miroslav Petr,&nbsp;Agnieszka Maciejewska-Skrendo","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Cytokines, such as interleukins, are crucial in regulating critical cell signaling pathways as well as being major contributors to inflammatory response and are upregulated during ligament and tendon injuries. The genes encoding key interleukins, such as <i>IL1B</i> and <i>IL6</i> as well as interleukin receptor <i>IL6R</i>, were chosen as candidate genes for association with soft tissue injuries. The aim of the case-control study was to verify the hypothesis that sequence variants rs1143627, rs16944, rs1800795, rs2228145 in the <i>IL1B</i>, <i>IL6</i> and <i>IL6R</i> genes are associated with ACL rupture susceptibility in a Polish population. Among four analyzed SNPs, the rs1800795 <i>IL6</i> gene polymorphism was found to be the only one significantly associated with ACL rupture (p = 0.010, p = 0.022, p = 0.004 for codominant, recessive and overdominant models, respectively; odds ratio = 1.74, 95% CI 1.08-2.81, sex adjusted p = 0.032 for recessive model). With reference to the other analyzed polymorphisms, we failed to show significant differences in the genotype and allele frequencies for <i>IL6R</i> rs2228145as well as <i>IL1B</i> rs16944 and rs1143627 (analyzed alone or in haplotype combination) between the ACL rupture group and the healthy control group among Polish participants. Due to the nature of case-control studies, the results of this study need to be confirmed in independent studies with larger sample sizes.</p>","PeriodicalId":520691,"journal":{"name":"Journal of sports science & medicine","volume":" ","pages":"137-145"},"PeriodicalIF":3.2,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6370956/pdf/jssm-18-137.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"36975561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}