Sports Biomechanics最新文献_第2页

Upper limb muscle strength and knee frontal plane projection angle asymmetries in female water-polo players. 女子水球运动员的上肢肌肉力量和膝关节额平面投影角不对称。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-08-04 DOI: 10.1080/14763141.2021.1956577

Theodoros M Bampouras, Andrew J Wilson, Konstantinos Papadopoulos

{"title":"Upper limb muscle strength and knee frontal plane projection angle asymmetries in female water-polo players.","authors":"Theodoros M Bampouras, Andrew J Wilson, Konstantinos Papadopoulos","doi":"10.1080/14763141.2021.1956577","DOIUrl":"10.1080/14763141.2021.1956577","url":null,"abstract":"Water-polo players frequently perform overhead throws that could result in shoulder imbalances. For overhead throws, execution of the 'eggbeater kick' (cyclical movement of the legs) is required to lift the body out of the water. Although a symmetrical action, inter-limb differences in task execution could lead to knee frontal plane projection (FPPA) differences. The present study examined imbalances shoulder and knee FPPA in female players. Eighteen competitive female field players (24.1 ± 5.5 years, 1.68 ± 0.06 m, 72.9 ± 13.3 kg) had their shoulder strength assessed in a shot-mimicking position with a portable dynamometer, standing and seated (isolating the shoulder contribution). Anterior: posterior and shooting: non-shooting shoulder comparison were made. Additionally, players performed a drop jump. Knee FPPA was recorded from digitising and comparing the frames just before landing and at stance phase. During standing, players exhibited higher shooting: non-shooting asymmetry (p = 0.032) in the anterior contraction direction, while during seated the shooting shoulder anterior: posterior asymmetry was higher (p = 0.032). Interlimb knee FPPA asymmetry was higher in the stance phase (p = 0.02). Despite the overhead throwing and egg-beater demands impacting differently on each limb, considerable asymmetries do not develop, suggesting the overall training requirements (e.g. swimming, resistance training) were sufficient to maintain the asymmetry within desirable limits.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39274182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inter-limb differences in unilateral countermovement jump height are not associated with the inter-limb differences in bilateral countermovement jump force production. 单侧反向运动跳跃高度的肢间差异与双侧反向运动跳跃发力的肢间差异无关。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-09-22 DOI: 10.1080/14763141.2021.1980091

Sergio Miras-Moreno, Alejandro Pérez-Castilla, F Javier Rojas, Danica Janicijevic, Juan Carlos De la Cruz, Mar Cepero, Amador García-Ramos

{"title":"Inter-limb differences in unilateral countermovement jump height are not associated with the inter-limb differences in bilateral countermovement jump force production.","authors":"Sergio Miras-Moreno, Alejandro Pérez-Castilla, F Javier Rojas, Danica Janicijevic, Juan Carlos De la Cruz, Mar Cepero, Amador García-Ramos","doi":"10.1080/14763141.2021.1980091","DOIUrl":"10.1080/14763141.2021.1980091","url":null,"abstract":"This study aimed to explore the relationship between the inter-limb differences in unilateral countermovement (CMJ) height and the inter-limb differences in bilateral CMJ force production, and to elucidate whether the self-reported preferred leg contributes more to force production than the non-preferred leg. Twenty-three senior basketball players performed in a single session eight unilateral CMJs (four with each leg) and four bilateral CMJs. Impulse, peak force, mean force were recorded during the bilateral CMJ, and jump height during the unilateral CMJ. Small correlations were observed between the inter-limb differences in unilateral CMJ height and the inter-limb asymmetries in bilateral CMJ impulse, peak force, and mean force (p ≥ 0.171; r≤-0.142). The self-reported preferred leg revealed a higher performance in 7 out of 23 participants (Kappa = -0.20) for the unilateral CMJ height, 7 out of 23 participants (Kappa = -0.11) for the bilateral CMJ impulse, 6 out of 23 participants (Kappa = -0.36) for the bilateral CMJ peak force, and 8 out of 23 participants (Kappa = -0.34) for the bilateral CMJ mean force. These results highlight that the asymmetries detected during bilateral CMJs cannot be extrapolated to unilateral CMJs, and that the preferred leg generally contributes less to force production than the non-preferred leg during both bilateral and unilateral CMJs.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39438166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying throwing load in handball: a method for measuring the number of throws. 手球投掷负荷的量化：测量投掷次数的方法。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-07-23 DOI: 10.1080/14763141.2021.1951345

Sebastian Deisting Skejø, Behnam Liaghat, Claes Christian Jakobsen, Merete Møller, Jesper Bencke, Giovanni Papi, Nikolaj Pelle Kunwald, Henrik Sørensen

{"title":"Quantifying throwing load in handball: a method for measuring the number of throws.","authors":"Sebastian Deisting Skejø, Behnam Liaghat, Claes Christian Jakobsen, Merete Møller, Jesper Bencke, Giovanni Papi, Nikolaj Pelle Kunwald, Henrik Sørensen","doi":"10.1080/14763141.2021.1951345","DOIUrl":"10.1080/14763141.2021.1951345","url":null,"abstract":"Shoulder injuries are a common problem in handball. One likely cause of such injuries is excessive throwing. However, it is difficult to measure the number of player throws in large cohort studies using existing methods accurately. Therefore, the purpose of this study is to develop and validate a method for identifying overhead throws using a low-cost inertial measurement unit (IMU) worn on the wrist. In a two-stage approach, we developed a threshold-based automatic identification method for overhead throws in a laboratory study using the IMU. Subsequently, we validated the suggested thresholds in a field setting by comparing throws identified by the threshold-method to throws identified by video recordings of handball practices. The best set of threshold values resulted in a per-player median sensitivity of 100% (range: 84-100%) and a median positive predictive value (PPV) of 96% (range: 86-100%) in the development study. In the validation study, the per-player median sensitivity dropped to 78% sensitivity (range: 52-91%), while the per-player median PPV dropped to 79% (range: 47-90%). The proposed method is a promising method for automatically identifying handball throws in a cheap and feasible way.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39210820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of fatigue on peak Achilles tendon force in Irish dancing-specific landing tasks. 疲劳对爱尔兰舞蹈特定着地任务中跟腱峰值力量的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-07-27 DOI: 10.1080/14763141.2021.1951826

Ceridwen R Radcliffe, Celeste E Coltman, Wayne A Spratford

{"title":"The effect of fatigue on peak Achilles tendon force in Irish dancing-specific landing tasks.","authors":"Ceridwen R Radcliffe, Celeste E Coltman, Wayne A Spratford","doi":"10.1080/14763141.2021.1951826","DOIUrl":"10.1080/14763141.2021.1951826","url":null,"abstract":"Achilles tendinopathy is prevalent among Irish dancers, believed to be due to aesthetic technical requirements and high-impact landing tasks. However, the peak Achilles tendon force during Irish dancing-specific landing tasks has not been quantified. Furthermore, the influence of fatigue is unclear. This study aimed to quantify the peak Achilles tendon force during three common Irish dancing landing tasks and investigate the effects of fatigue on this force. Twelve nationally competitive Irish dancers completed the landing tasks prior to and following a fatigue protocol. A Vicon motion analysis system and AMTI force plates were used to calculate sagittal plane ankle joint kinematics during landing to estimate peak Achilles tendon force. Three independent measures (Rating-of-Fatigue scale, Flight time: Contraction during a counter movement jump and jump height during the landing trials) were used to evaluate participant fatigue between conditions. Results revealed a significant difference in peak Achilles tendon force between the three landing tasks, however, no significant difference was observed between pre- and post-fatigue. Further research is required to investigate the effects of the landing technique used in Irish Dancing on peak Achilles tendon force with the aim to reduce peak Achilles tendon force and the risk of developing Achilles tendinopathy.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39227189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validity and reliability of linear position transducers and linear velocity transducers: a systematic review. 线性位置传感器和线性速度传感器的有效性和可靠性：系统综述。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-11-02 DOI: 10.1080/14763141.2021.1988136

Adrián Moreno-Villanueva, José Pino-Ortega, Markel Rico-González

{"title":"Validity and reliability of linear position transducers and linear velocity transducers: a systematic review.","authors":"Adrián Moreno-Villanueva, José Pino-Ortega, Markel Rico-González","doi":"10.1080/14763141.2021.1988136","DOIUrl":"10.1080/14763141.2021.1988136","url":null,"abstract":"This systematic review aimed to summarise and analyse the evidence on the reliability and validity of linear tranducers (LTs) in exercises of different nature and different modes of execution. This systematic review was carried out under PRISMA guidelines, and was carried out using three databases (PubMed, Web of Sciences, and Scopus). Of the 351 initially found, 21 were included in the qualitative synthesis. The results reflected that linear position transducers (LPTs) were valid and reliable in monitoring movement velocity in non-plyometric exercises. However, precision and reliability were lower in execution protocols without isometric phase and in the execution of exercises in multiple planes of movement, with greater measurement errors at higher sampling frequencies. On the other hand, linear velocity transducers (LVTs) proved to be valid and reliable in measuring velocity during plyometric and non-plyometric exercises performed on the Smith machine, with less variation in measurement in the latter. Finally, the use of peak values is recommended, since they are less dependent on the technological errors of LTs. Therefore, the performance of non-plyometric exercises, carried out in the Smith machine and with an isometric phase in the execution of the movement, will help to minimise the technological error of the LTs.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39583362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Does exhaustion modify acceleration running signature? 疲惫是否会改变加速度运行特征？

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-11-03 DOI: 10.1080/14763141.2021.1974930

Thomas Provot, Aymeric Nadjem, Laura Valdes-Tamayo, Maxime Bourgain, Xavier Chiementin

{"title":"Does exhaustion modify acceleration running signature?","authors":"Thomas Provot, Aymeric Nadjem, Laura Valdes-Tamayo, Maxime Bourgain, Xavier Chiementin","doi":"10.1080/14763141.2021.1974930","DOIUrl":"10.1080/14763141.2021.1974930","url":null,"abstract":"Previous studies have demonstrated the acceleration signal presents a typical running signature, which allows for the extraction of reliable information. However, few studies have focused on the exhaustion-induced variability of the acceleration signature during running. The present study included 10 participants who ran at a constant speed on a treadmill until exhaustion. The participants were equipped with three accelerometers, located at the lumbar spine, tibia, and foot. The results showed that all the participants kept a constant pace throughout the test (coefficient of variation <5%). Similarities between acceleration signatures were observed using the coefficient of multiple correlation. For the longitudinal axis of the lumbar spine, the longitudinal axis of the tibia, and the anteroposterior axis of the tibia, running signatures were not affected by exhaustion (coefficient of multiple correlation >0.8). For all the other axes, the signature was impacted within and between the states of exhaustion. Signatures were particularly different for the foot sensors, which makes it difficult to use to extract reliable information. The results showed that the coefficient of multiple correlation allowed the quantification of the variability of the running signature, and that each axis and measuring point varied in how they were influenced by exhaustion.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39586441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peak tibial accelerations in different foot strike patterns during level running: an independent investigation in different cohorts. 平地跑步时不同脚掌着地模式下的胫骨峰值加速度：对不同组群的独立调查。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 DOI: 10.1080/14763141.2024.2367619

Pieter Van den Berghe, Sander De Bock, Bastiaan Breine, Nicolas Horvais, Allison Gruber, Joren Six, Pierre Samozino, Marc Leman, Jean-Benoît Morin, Dirk De Clercq, Marlène Giandolini

{"title":"Peak tibial accelerations in different foot strike patterns during level running: an independent investigation in different cohorts.","authors":"Pieter Van den Berghe, Sander De Bock, Bastiaan Breine, Nicolas Horvais, Allison Gruber, Joren Six, Pierre Samozino, Marc Leman, Jean-Benoît Morin, Dirk De Clercq, Marlène Giandolini","doi":"10.1080/14763141.2024.2367619","DOIUrl":"10.1080/14763141.2024.2367619","url":null,"abstract":"Peak tibial accelerations are used to monitor impact severity during distance running and as input for bio-feedback. Here, peak tibial accelerations were compared between rearfoot and forefoot strikes. Two different studies were undertaken by independent research centres. Tibial acceleration and optical motion capture were collected in 14 rearfoot strikers who changed to a forefoot strike in the first centre. In the second centre, tibial acceleration of 14 other rearfoot strikers and nine forefoot strikers were collected and processed. In over-ground level running at a submaximal speed, the resultant peak tibial acceleration was greater in the instructed forefoot strike condition (Δ<math><mi>X</mi></math> = 7.6 ± 1.3 g, mean ± standard error difference) and in the habitual forefoot strikers (Δ<math><mover><mi>X</mi><mo>-</mo></mover></math> = 3.7 ± 1.1 g) than in the rearfoot strikers. The shank kinematics revealed a greater decrease in antero-posterior velocity following touchdown in the forefoot strike condition. The forefoot strikes experienced greater posterior tibial acceleration, which resulted in an increased resultant peak tibial acceleration that also occurred earlier than in the rearfoot strikes. No significant difference in axial peak tibial acceleration was found between these foot strike patterns. In conclusion, the foot strike pattern differently affects peak tibial accelerations in level running, which can have implications for monitoring and biofeedback applications.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142331021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Responses to a combined dynamic stretching and antagonist static stretching warm-up protocol on isokinetic leg extension performance. 动态拉伸和拮抗剂静态拉伸联合热身方案对等动腿伸展能力的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-07-15 DOI: 10.1080/14763141.2021.1944290

David Cogley, Paul Byrne, Joseph Halstead, Colin Coyle

{"title":"Responses to a combined dynamic stretching and antagonist static stretching warm-up protocol on isokinetic leg extension performance.","authors":"David Cogley, Paul Byrne, Joseph Halstead, Colin Coyle","doi":"10.1080/14763141.2021.1944290","DOIUrl":"10.1080/14763141.2021.1944290","url":null,"abstract":"Antagonist static-stretching and dynamic-stretching are both effective at improving muscular performance. The purpose of this study was to investigate responses to a dynamic stretching warm-up protocol, a static-stretching warm-up protocol and a combined dynamic-stretching and antagonist static stretching warm-up protocol on isokinetic leg extension performance. Twelve participants completed a baseline (PRE) isokinetic knee-extension test at 60°.s-1 and 300°.s-1, following a 5 min warm-up on a cycle ergometer. Subsequently, participants completed the following warm-up protocols randomly over a three-week period: dynamic-stretching (DS); antagonist muscle static-stretching (AMSS) and dynamic followed by antagonist muscle static-stretching (DS-AMSS). A repeated measures analysis of variance (ANOVA) was conducted to determine where significant differences existed for peak torque, total work, average power, time-to-peak-torque and relative peak torque between warm-up protocols. DS-AMSS facilitated a significantly higher peak torque and total work compared to PRE, DS and AMSS at 60°.s-1 and 300°.s-1 P < 0.05, respectively). DS-AMSS caused significantly greater relative peak torque than PRE for 60°.s-1 and 300°.s-1 (P < 0.05). DS-AMSS resulted in significantly reduced time-to-peak-torque and increased average power at 60°.s-1 compared to PRE, DS and AMSS (P < 0.05). DS-AMSS and AMSS resulted in a significant reduction in time-to-peak-torque and increased average power compared to the PRE and DS (P < 0.05) at 300°.s-1.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39185597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Injury risk-factor differences between two golf swing styles: a biomechanical analysis of the lumbar spine, hip and knee. 两种高尔夫挥杆方式的损伤风险因素差异：腰椎、髋关节和膝关节的生物力学分析。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-07-19 DOI: 10.1080/14763141.2021.1945672

Kiran D Kanwar, Jordan Cannon, David L Nichols, George J Salem, Mark D Mann

{"title":"Injury risk-factor differences between two golf swing styles: a biomechanical analysis of the lumbar spine, hip and knee.","authors":"Kiran D Kanwar, Jordan Cannon, David L Nichols, George J Salem, Mark D Mann","doi":"10.1080/14763141.2021.1945672","DOIUrl":"10.1080/14763141.2021.1945672","url":null,"abstract":"The golf swing has been associated with mechanical injury risk factors at many joints. One swing, the Minimalist Golf Swing, was hypothesised to reduce lumbar spine, lead hip, and lead knee ranges of motion and peak net joint moments, while affecting swing performance, compared to golfers' existing swings. Existing and MGS swings of 15 golfers with handicaps ranging from +2 to -20 were compared. During MGS downswing, golfers had 18.3% less lumbar spine transverse plane ROM, 40.7 and 41.8% less lead hip sagittal and frontal plane ROM, and 39.2% less lead knee sagittal plane ROM. MGS reduced lead hip extensor, abductor, and internal rotator moments by 17.8, 19.7 and 43%, while lead knee extensor, abductor, adductor and external rotator moments were reduced by 24.1, 26.6, 37 and 68.8% respectively. With MGS, club approach was 2° shallower, path 4° more in-to-out and speed 2 m/s slower. MGS reduced certain joint ROM and moments that are linked to injury risk factors, while influencing club impact factors with varying effect. Most golf injuries are from overuse, so reduced loads per cycle with MGS may extend the healthy life of joints, and permit golfers to play injury-free for more years.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39200046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bilateral deficit in countermovement jump and its association with change of direction performance in basketball and tennis players. 篮球和网球运动员双侧反向运动跳跃能力不足及其与变向表现的关系。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-10-01 Epub Date: 2021-06-16 DOI: 10.1080/14763141.2021.1942965

Žiga Kozinc, Nejc Šarabon

{"title":"Bilateral deficit in countermovement jump and its association with change of direction performance in basketball and tennis players.","authors":"Žiga Kozinc, Nejc Šarabon","doi":"10.1080/14763141.2021.1942965","DOIUrl":"10.1080/14763141.2021.1942965","url":null,"abstract":"The purpose of this study was to assess the association between bilateral deficit (BLD) in countermovement jump and change of direction (CoD) performance. Therefore, 165 young basketball players (60 females) and 95 young tennis players (39 females) performed two different CoD tasks (90° and 180° turns) and bilateral and unilateral countermovement jumps. BLD was calculated based on jump height, peak power and several phase-specific force impulses (FI). For male athletes, several statistically significant small to moderate associations were found between the CoD performance and BLD (r = 0.21-0.52). While the BLD in the propulsive phase FI seems to be most consistently associated with CoD performance, all associations were weak (r = 0.21-0.28 in basketball, 0.28-0.36 in tennis). Associations between BLD in total positive (braking and propulsive phase) FI and CoD performance were moderate (r = 0.45-0.52) in male tennis players. For female athletes, the associations were even smaller and almost exclusively statistically non-significant. Although indirectly, our results imply that resistance training based on unilateral exercises could be useful to improve CoD performance. It has to be stressed that further training studies are needed to directly confirm this assumption.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":null,"pages":null},"PeriodicalIF":2.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39235177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0