Redd Michael J, Starling-Smith Tristan M, Herring Chad H, Stock Matt S, Wells Adam J, Stout Jeffrey R, Fukuda David H
Institute of Exercise Physiology and Rehabilitation Science, School of Kinesiology and Physical Therapy, University of Central Florida, Orlando, FL 32816, USA.
J Funct Morphol Kinesiol. 2021 Sep 23;6(4):80. doi: 10.3390/jfmk6040080.
The mechanical properties of knee flexors and extensors in 15 collegiate male soccer players following different warm-up protocols [small-sided games (SSG), dynamic (DYN), and plyometric (PLY)] were evaluated. Tensiomyography (TMG) was used to assess contraction time (Tc), delay time (Td) and maximal displacement (Dm) of the rectus femoris (RF) and biceps femoris (BF) of both legs before and after each warm-up, while countermovement jump height variables, 20 m sprint, -test and sit-and-reach were measured following the warm-ups. TMG was analyzed using a three-way [condition × time × leg] ANOVA, while performance variables were analyzed with a repeated measures ANOVA. Main effects of time were observed for BF-Tc ( = 0.035), RF-Td ( < 0.001), and BF-Td, ( = 0.008), and a main effect of condition was seen for RF-Tc ( = 0.038). Moreover, participants' 20 m sprint improved following SSG ( = 0.021) compared to DYN and PLY. Sit-and-reach was greater following PLY ( = 0.021). No significant interactions were noted for the measured TMG variables. Warm-up-specific improvements were demonstrated in sprint speed and flexibility following SSG and PLY, respectively. The present study revealed changes in certain TMG measures following the warm-ups that suggest enhanced response of lower leg muscles regardless of specific activities used.
评估了15名大学男子足球运动员在不同热身方案[小型比赛（SSG）、动态（DYN）和增强式（PLY）]后膝关节屈伸肌的力学性能。在每次热身前后，使用张力肌电图（TMG）评估双腿股直肌（RF）和股二头肌（BF）的收缩时间（Tc）、延迟时间（Td）和最大位移（Dm），同时在热身之后测量反向纵跳高度变量、20米短跑、 -测试和坐位体前屈。使用三因素[条件×时间×腿]方差分析对TMG进行分析，而对表现变量则使用重复测量方差分析。观察到时间对BF-Tc（ = 0.035）、RF-Td（ < 0.001）和BF-Td（ = 0.008）有主效应，条件对RF-Tc（ = 0.038）有主效应。此外，与DYN和PLY相比，参与者在SSG之后20米短跑成绩有所提高（ = 0.021）。PLY之后坐位体前屈更大（ = 0.021）。对于测量的TMG变量，未发现显著的交互作用。分别在SSG和PLY之后，短跑速度和灵活性有特定热身带来的改善。本研究揭示了热身之后某些TMG测量值的变化，这表明无论使用何种特定活动，小腿肌肉的反应都有所增强。
