Angle-Specific Eccentric Hamstring Fatigue After Simulated Soccer

被引:47
作者
Cohen, Daniel D. [1 ]
Zhao, Bingnan [2 ]
Okwera, Brian [2 ]
Matthews, Martyn J. [3 ]
Delextrat, Anne [4 ]
机构
[1] Univ Santander UDES, Fac Life Sci, Masira Inst, Bucaramanga, Colombia
[2] London Metropolitan Univ, Fac Life Sci, London, England
[3] Univ Salford, Sch Hlth Sci, Salford M5 4WT, Lancs, England
[4] Oxford Brookes Univ, Fac Sport & Hlth Sci, Oxford OX3 0BP, England
关键词
injury-risk screening; strength imbalance; eccentric strength; muscle fatigue; isokinetic testing; RULES FOOTBALL PLAYERS; STRAIN INJURY; STRENGTH; IMBALANCE; RISK; FATIGABILITY; RELIABILITY; QUADRICEPS; SPRINTERS; EXTENSORS;
D O I
10.1123/ijspp.2014-0088
中图分类号
Q4 [生理学];
学科分类号
071003 [生理学];
摘要
Purpose: To evaluate the effect of simulated soccer on the hamstrings eccentric torque-angle profile and angle of peak torque (APT(ecc)H), and on the hamstrings:quadriceps torque ratio at specific joint angles (H-As(ecc):Q(con)). Methods: The authors assessed dominant-limb isokinetic concentric and eccentric knee flexion and concentric knee extension at 120 degrees/s in 9 semiprofessional Male soccer players immediately before and after they completed the Loughborough Intermittent Shuttle Test (LIST). Results: The LIST resulted in significant decreases in eccentric hamstrings torque at 60, 50, and 10 and a significant (21.8%) decrease in H-As(ecc):Q(con) at 10 degrees (P < .05). APT(ecc)H increased from 7.1 +/- 1.0 to 18.8 +/- 4.2 (P < .05). Eccentric hamstrings peak torque significantly declined from 185.1 +/- 70.4 N.m pre-LIST to 150.9 +/- 58.5 N.m post-LIST (P = .002), but there were no significant changes in hamstrings or quadriceps concentric peak torque (P = .312,.169, respectively). Conclusions: Simulated soccer results in a selective loss of eccentric hamstrings torque and hamstrings-to-quadriceps muscle balance at an extended joint position and a shift in the eccentric hamstrings APT to a shorter length, changes that could increase vulnerability to hamstrings injury. These findings suggest that injury-risk screening could be improved by evaluating the eccentric hamstrings torque-angle profile and hamstrings strength-endurance and that the development of hamstrings fatigue resistance and long-length eccentric strength may reduce injury incidence.
引用
收藏
页码:325 / 331
页数:7
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