PDF(Pubmed)
Abstract：
Hamstring strain injuries (HSI) are still the most common injuries in soccer. Recent research has been focusing on the role of hamstring muscle morphology and architecture. The hamstring\'s fibre type composition might play a role as well, but this has never been investigated in the light of HSI risk in an athletic population. The purpose of this study was to investigate the association between hamstring muscle fibre type, hamstring strain injury history (HSIH), performance and isokinetic strength in a population of amateur male soccer players. In this cross-sectional observational study, 44 male soccer players (22 with and 22 without HSIH) participated. The research consisted of a non-invasive fibre composition evaluation using proton magnetic resonance spectroscopy (1H-MRS), functional performance (evaluated by means of maximal jumping height, maximal sprinting speed and hamstring muscle strength endurance (single leg hamstring bridge testing)), and isokinetic strength testing. The results revealed that hamstring carnosine concentration demonstrated a high inter-individual variability within this soccer population and was not significantly associated with either HSIH or with any of the functional performance parameters. The only secondary outcome measure presenting a significant association with the intramuscular carnosine content was the hamstrings\' explosive strength production capacity, objectified by means of the time to peak torque (TPT), measured concentrically at an angular velocity of 240 degrees/second (°/s) during isokinetic strength testing. This TPT was significantly shorter in players presenting higher carnosine concentrations (p = 0.044). The findings indicate that in male amateur soccer players (1) the hamstrings have no distinct fibre type dominance and (2) fibre typology in this population does not relate to HSIH or performance.
摘要：
腿筋拉伤（HSI）仍然是足球中最常见的伤害。最近的研究集中在腿筋肌肉形态和结构的作用上。腿筋的纤维型成分也可能发挥作用，但这从未在运动人群的HSI风险中进行过调查。这项研究的目的是研究腿筋肌纤维类型之间的关联，腿筋拉伤史（HSIH），业余男性足球运动员的表现和等速力量。在这项横断面观察研究中，44名男性足球运动员（22名没有HSIH和22名）参加了比赛。该研究包括使用质子磁共振波谱（1H-MRS）进行的非侵入性纤维成分评估，功能性能(通过最大跳跃高度评估，最大冲刺速度和腿筋肌肉力量耐力（单腿腿筋桥测试）），和等速强度测试。结果表明，腿筋肌肽浓度在该足球人群中表现出很高的个体间变异性，并且与HSIH或任何功能性能参数都没有显着相关。与肌内肌肽含量显著相关的唯一次要结果指标是腿筋爆炸强度生产能力，通过达到峰值扭矩(TPT)的时间来对象化，在等速强度测试期间，以240度/秒（°/s）的角速度同心测量。该TPT在呈现较高肌肽浓度的玩家中显著较短(p=0.044)。研究结果表明，在男性业余足球运动员中（1）腿筋没有明显的纤维类型优势，并且（2）该人群中的纤维类型与HSIH或性能无关。
