Sports Biomechanics最新文献_第8页

Changes in torque complexity and maximal torque after a fatiguing exercise protocol. 疲劳运动方案后扭矩复杂性和最大扭矩的变化。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2022-04-29 DOI: 10.1080/14763141.2022.2067588

João Oliveira, Nuno Casanova, João S Gomes, Pedro Pezarat-Correia, Sandro Freitas, João R Vaz

{"title":"Changes in torque complexity and maximal torque after a fatiguing exercise protocol.","authors":"João Oliveira, Nuno Casanova, João S Gomes, Pedro Pezarat-Correia, Sandro Freitas, João R Vaz","doi":"10.1080/14763141.2022.2067588","DOIUrl":"10.1080/14763141.2022.2067588","url":null,"abstract":"Torque outputs exhibit non-random fluctuations in their temporal structure, i.e., complexity. Fatigue has been shown to alter this structure. The torque outputs typically become more regular, resulting in decreased adaptability. Importantly, torque complexity was shown a different recovery pattern after fatigue compared to maximal torque. However, it remains to be understood if these uncoupled patterns of recovery are muscle dependent. In addition, it also remains to be investigated if changes in maximal torque and complexity are correlated. This study investigated (i) the effects of a fatiguing protocol on the complexity and maximal torque from plantar flexors and (ii) the relationship between changes in these two outputs. Ten participants visited the laboratory, and measures were taken at baseline, immediately after, 1 h after and 24 h after the fatiguing protocol. Maximum voluntary contraction, isometric contractions at 30% of maximum and pain pressure threshold were collected. Both legs were assessed, but only one was given the fatiguing protocol. Two-way ANOVAs and correlations were conducted. The fatiguing protocol decreased torque complexity (~35%) and maximal torque (~20%), and they exhibited uncoupled patterns of recovery. Moreover, the correlation analysis showed no correlation between changes in these parameters. These findings support that these parameters are independent of each other.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":"1 1","pages":"2873-2885"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42564827","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

Differences in running biomechanics and tibiotalar cartilage T2 relaxation time between runners with and without asymptomatic tibial sesamoid bone marrow edema - clinical case series. 有症状和无症状胫骨剑突骨骨髓水肿的跑步者在跑步生物力学和胫骨软骨T2弛豫时间上的差异--临床病例系列。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2024-05-27 DOI: 10.1080/14763141.2024.2356859

Hyun Kyung Kim, Seyed Ali Mirjalili

{"title":"Differences in running biomechanics and tibiotalar cartilage T2 relaxation time between runners with and without asymptomatic tibial sesamoid bone marrow edema - clinical case series.","authors":"Hyun Kyung Kim, Seyed Ali Mirjalili","doi":"10.1080/14763141.2024.2356859","DOIUrl":"10.1080/14763141.2024.2356859","url":null,"abstract":"The impact of asymptomatic bone marrow edema (BME) in sesamoids on running biomechanics remains largely unknown, but exploring this relationship could aid early detection of forefoot-related injuries with cost-effective modalities. This study aimed to compare the running biomechanics of runners with asymptomatic BME in the tibial sesamoids with that of healthy controls. Four runners with asymptomatic BME in tibial sesamoids and four healthy runners participated. Lower extremity joint kinetics and kinematics were assessed along with plantar pressure while running at a self-selected speed. The T2 relaxation time of the tibiotalar cartilage was measured using MRI-derived T2 maps. Compared to the non-injured group, the injured group exhibited significantly lower plantar pressure under the hallux (p = 0.001), increased peak ankle rotation angles (p = 0.025), reduced ankle power generation (p = 0.049), and increased knee extension torque (p = 0.015). No significant differences in T2 values of the tibiotalar cartilage were observed. It appears that runners with asymptomatic BME adapted their running strategies by modifying their ankle biomechanics and reducing plantar pressure, even in the absence of pain. While the precise implications of these biomechanical alterations warrant further investigation, this study provides valuable insights into the relationship between asymptomatic BME and running biomechanics.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3466-3477"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141158322","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

Effects of hurdle height on lower limb joint kinematics and kinetics of male trainee sprinters during hurdle jumps. 跨栏高度对男子运动员跨栏时下肢关节运动学和动力学的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2023-07-31 DOI: 10.1080/14763141.2023.2241852

Keitaro Seki, Shingo Hondo

{"title":"Effects of hurdle height on lower limb joint kinematics and kinetics of male trainee sprinters during hurdle jumps.","authors":"Keitaro Seki, Shingo Hondo","doi":"10.1080/14763141.2023.2241852","DOIUrl":"10.1080/14763141.2023.2241852","url":null,"abstract":"Hurdle jumps are frequently practiced in the field of sports training. The present study aimed to clarify the effect of hurdle heights on jumping height and joint kinematics, and kinetics during hurdle jumps. Ten male Japanese trainee sprinters performed at three heights (0.76, 0.91 and 1.06 m) of hurdle jumps and maximum countermovement jump (CMJ). Sagittal plane kinematics and ground reaction force were measured. Jump height significantly increased with hurdle heights (ηp2 = 0.65), but the difference in jump heights was small as compared to the difference in the hurdle heights. The contact time and mechanical work of the lower limb joints did not differ between different hurdle heights. The minimal angles of the knee (ηp2 = 0.47) and hip (ηp2 = 0.70) joints during the flight phase significantly decreased with higher hurdle heights. The load characteristics of the lower limb joint with higher hurdle heights would be similar to those with lower hurdle heights. In higher hurdle heights, since the increase in jump height was smaller than the increase in hurdle height, the legs were more flexed to clear the hurdle. Therefore, the hurdle height which is similar to the maximum CMJ height would be appropriate as a training load.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3131-3140"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9897573","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

Effect of backstroke ledge on backstroke start technique for water entry. 仰泳凸台对仰泳入水起跳技术的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2023-08-11 DOI: 10.1080/14763141.2023.2245807

Daisuke Sato, Hiroshi Suito, Naoyuki Yamashita, Kenta Kusanagi, Takuya Mizukami, Shigehiro Takahashi

{"title":"Effect of backstroke ledge on backstroke start technique for water entry.","authors":"Daisuke Sato, Hiroshi Suito, Naoyuki Yamashita, Kenta Kusanagi, Takuya Mizukami, Shigehiro Takahashi","doi":"10.1080/14763141.2023.2245807","DOIUrl":"10.1080/14763141.2023.2245807","url":null,"abstract":"This study aimed to investigate how the use of a backstroke ledge (BSL) affects backstroke start performance in terms of flight distance and water entry posture in competitive backstroke swimmers. Ten male swimmers performed a maximum of 15 m in backstroke, starting with or without a BSL. Two 120 Hz and one 60 Hz video cameras were used to analyse the kinematic variables and angular momentum of the whole body. Using a BSL reduced the time to reach 5 and 15 m compared with not using a BSL (p < 0.04). Using a BSL heightened vertical position of the centre of mass (CM) at take-off, lengthened flight distance, and increased angular momentum (p < 0.02). Additionally, the lower limb entry angle was larger, and the hole entry posture angle was smaller with a BSL than without a BSL (p < 0.04). These results suggest that a high CM position at the start of the backstroke with a BSL increased the flight distance, and a large angular momentum enabled hole entry as well as improved the horizontal velocity after water entry. Hence, increases in flight distance and velocity after water entry were contributing factors in improving the start performance of the backstroke when using a BSL.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3235-3245"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10028671","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

What to stretch? - Isolated proprioceptive neuromuscular facilitation stretching of either quadriceps or triceps surae followed by post-stretching activities alters tissue stiffness and jump performance. 拉伸什么？- 对股四头肌或肱三头肌进行孤立本体感觉神经肌肉促进拉伸，然后进行拉伸后活动，可改变组织僵硬度和跳跃表现。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2022-04-10 DOI: 10.1080/14763141.2022.2058991

Andreas Konrad, Wolfgang Seiberl, Markus Tilp, Denis Holzer, Florian Kurt Paternoster

{"title":"What to stretch? - Isolated proprioceptive neuromuscular facilitation stretching of either quadriceps or triceps surae followed by post-stretching activities alters tissue stiffness and jump performance.","authors":"Andreas Konrad, Wolfgang Seiberl, Markus Tilp, Denis Holzer, Florian Kurt Paternoster","doi":"10.1080/14763141.2022.2058991","DOIUrl":"10.1080/14763141.2022.2058991","url":null,"abstract":"To overcome a possible drop in performance following longer stretch durations (>60 s), post-stretching dynamic activities (PSA) can be applied. However, it is not clear if this is true for isolated proprioceptive neuromuscular facilitation (PNF) stretching of different muscle groups (e.g., triceps surae and quadriceps). Thus, 16 participants performed both interventions (triceps surae PNF + PSA; quadriceps PNF + PSA) in random order, separated by 48 h. Jump performance was assessed with a force plate, and tissue stiffness was assessed with a MyotonPro device. While no changes were detected in the countermovement jump performance, the PNF + PSA interventions resulted in a decrease in drop jump performance which led to a large magnitude of change following the triceps surae PNF + PSA and a small-to-medium magnitude of change following the quadriceps PNF + PSA. Moreover, in the triceps surae PNF + PSA intervention, a decrease in Achilles tendon stiffness was seen, while in the quadriceps PNF + PSA intervention, a decrease in the overall quadriceps muscle stiffness was seen. According to our results, we recommend that especially triceps surae stretching is avoided during warm-up (also when PSA is included) when the goal is to optimise explosive or reactive muscle contractions.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"2798-2815"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9217777","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

Usage and acceptability of data normalization in baseball pitching. 棒球投球中数据规范化的使用和可接受性。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2024-01-12 DOI: 10.1080/14763141.2024.2302830

Kevin A Giordano, Adam J Barrack, William M Murrah, Andrew R Karduna, Lori A Michener, Kyle W Wasserberger

{"title":"Usage and acceptability of data normalization in baseball pitching.","authors":"Kevin A Giordano, Adam J Barrack, William M Murrah, Andrew R Karduna, Lori A Michener, Kyle W Wasserberger","doi":"10.1080/14763141.2024.2302830","DOIUrl":"10.1080/14763141.2024.2302830","url":null,"abstract":"In baseball pitching biomechanics, kinetic values are commonly ratio 'normalised' by dividing by mass or mass*height to allow for comparison between athletes of different sizes. However, creating a normalised ratio variable should meet certain statistical assumptions. Our purpose was to determine if elbow valgus torque predicted by pitching velocity is influenced by normalisation using regression model comparison with and without normalised torque values. Motion capture data for youth to professional pitchers (n = 1988) were retrospectively analysed. Normalisation assumptions were tested by comparing linear regression models to analogous models with an intercept fixed at zero and by examining remaining correlations between the confounding variable and new, normalised variable. Both mass (p < 0.001) and mass*height (p < 0.001) normalisation did not remove their respective relationship with torque. After accounting for mass or mass and height, velocity predicted 10% of variance in elbow valgus torque, whereas velocity predicted 59% of mass normalised torque and 45% of mass*height normalised torque. Ratio normalisation does not fully account for anthropometric variables that differ across pitchers and leads to different conclusions in the magnitude of velocity's predictive effect on elbow valgus torque. Therefore, we recommend using regression model comparison to account for anthropometric variables in baseball pitching kinetic data.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3430-3441"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139425877","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

A biomechanical comparison of track spikes with advanced footwear technology to a traditional track spike in female distance runners. 采用先进鞋类技术的田径钉鞋与传统田径钉鞋在女性长跑运动员中的生物力学比较。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2024-08-27 DOI: 10.1080/14763141.2024.2393199

Christina Geisler, J J Hannigan

{"title":"A biomechanical comparison of track spikes with advanced footwear technology to a traditional track spike in female distance runners.","authors":"Christina Geisler, J J Hannigan","doi":"10.1080/14763141.2024.2393199","DOIUrl":"10.1080/14763141.2024.2393199","url":null,"abstract":"The addition of highly responsive lightweight foam and a stiff plate in the midsole of long-distance road racing shoes has yielded significant energetic cost savings that have translated to notable improvements in performance. This new foam and stiff plate technology have since been implemented in long-distance track spikes, where performances have also improved. However, the impact of spikes with advanced footwear technology (AFT) on distance running biomechanics has been studied minimally to date. Therefore, the purpose of this study was to compare running biomechanics between two spikes which incorporate AFT (Nike ZoomX Dragonfly, Nike Air Zoom Victory) to a traditional spike (Nike Zoom Matumbo). Seventeen competitive collegiate female runners completed 60 m trials at their 5k race pace in each spike condition while outfitted with IMU sensors and plantar pressure insoles. We observed significantly lower peak ankle dorsiflexion in the Dragonfly and Victory compared to the Matumbo and lower whole foot, forefoot and rearfoot peak and average pressure in the Dragonfly compared to the Matumbo and Victory. The acute biomechanical alterations observed in this study warrant future investigation into the association between running biomechanics and racing performance in track spikes with advanced footwear technology.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3667-3679"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142082348","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

Comparison of marker-less and marker-based motion capture for baseball pitching kinematics. 棒球投球运动学中无标记和基于标记的运动捕捉的比较。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2022-05-19 DOI: 10.1080/14763141.2022.2076608

Glenn S Fleisig, Jonathan S Slowik, Derek Wassom, Yuki Yanagita, Jasper Bishop, Alek Diffendaffer

{"title":"Comparison of marker-less and marker-based motion capture for baseball pitching kinematics.","authors":"Glenn S Fleisig, Jonathan S Slowik, Derek Wassom, Yuki Yanagita, Jasper Bishop, Alek Diffendaffer","doi":"10.1080/14763141.2022.2076608","DOIUrl":"10.1080/14763141.2022.2076608","url":null,"abstract":"The purpose of this study was to compare baseball pitching kinematics measured with marker-less and marker-based motion capture. Two hundred and seventy-five fastball pitches were captured at 240 Hz simultaneously with a 9-camera marker-less system and a 12-camera marker system. The pitches were thrown by 30 baseball pitchers (age 17.1 ± 3.1 years). Data for each trial were time-synchronised between the two systems using the instant of ball release. Coefficients of Multiple Correlations (CMC) were computed to assess the similarity of waveforms between the two systems. Discrete measurements at foot contact, during arm cocking, and at ball release were compared between the systems using Bland-Altman plots and descriptive statistics. CMC values for the five time series analysed ranged from 0.88 to 0.97, indicating consistency in movement patterns between systems. Biases for discrete measurements ranged in magnitude from 0 to 16 degrees. Standard deviations of the differences between systems ranged from 0 to 14 degrees, while intraclass correlations ranged from 0.64 to 0.92. Thus, the marker-based and marker-less motion capture systems produced similar patterns for baseball pitching kinematics. However, based on the variations between the systems, it is recommended that a database of normative ranges be established for each system.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":"1 1","pages":"2950-2959"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45090295","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 full-body weight-bearing on palmar pressure distribution in collegiate-level gymnasts. 全身负重对大学生体操运动员手掌压力分布的影响。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2024-11-07 DOI: 10.1080/14763141.2024.2424389

Noah M Scigliano, Jessica E Goetz, Ignacio Garcia Fleury, Kevin N Dibbern, Krit Petrachaianan, Joseph A Buckwalter V

{"title":"The effect of full-body weight-bearing on palmar pressure distribution in collegiate-level gymnasts.","authors":"Noah M Scigliano, Jessica E Goetz, Ignacio Garcia Fleury, Kevin N Dibbern, Krit Petrachaianan, Joseph A Buckwalter V","doi":"10.1080/14763141.2024.2424389","DOIUrl":"10.1080/14763141.2024.2424389","url":null,"abstract":"Wrist and hand biomechanics under full-body load are not fully understood. To identify potential anatomy-related differences in hand loading, 15 former collegiate athletes completed a 45-second handstand on a novel emed® pressure platform system. Center of pressure (CoP) and force distribution across the palmar surface were analysed during the stabilised phase. Maximum force, mean pressure, and contact area were calculated in four palmar anatomic subregions: hypothenar, thenar, metacarpals, and fingers. These values were related to ulnar variance measurements obtained from a participant handstand hold in a weight-bearing computed tomography machine. About 93% of participants shifted their CoP towards their dominant hand (p < 0.001), and among all participants, the dominant hand applied an average of 8.91% (p = 0.002) higher maximum force than the nondominant hand. The proportion of total mean force was highest in the hypothenar (47.1%) and thenar regions (36.5%). Every 1.00 mm increase in ulnar variance corresponded to a 2.8% increase in maximum force in the hypothenar region (p = 0.037). This investigation emphasises the role of gymnastics hand dominance on left/right hand weight distribution and the importance of the hypothenar zone in distributing pressure during handstands. It also indicates that force transmission through the wrist to the palm is contingent on radioulnar positioning.","PeriodicalId":49482,"journal":{"name":"Sports Biomechanics","volume":" ","pages":"3301-3311"},"PeriodicalIF":2.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607246","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

Effectiveness of a 3D bike fitting method in riding pain, fatigue and comfort: a randomised controlled clinical trial. 三维自行车装配法对骑行疼痛、疲劳和舒适度的影响：随机对照临床试验。

IF 2 3区医学

Sports Biomechanics Pub Date : 2024-12-01 Epub Date: 2023-02-27 DOI: 10.1080/14763141.2023.2173084

Rodrigo Rico Bini

引用次数: 0