Zakas A
Laboratory of Coaching, Division of Sports, Department of Physical Education and Sports Science, Aristotle University of Thessaloniki, Thessaloniki, Greece.
J Sports Med Phys Fitness. 2006 Mar;46(1):28-35.
Dominance of one leg may cause asymmetry between the contralateral muscle groups and develop predisposition for injury to the leg with the weaker muscle strength. The purpose of this study was to examine the strength balance in the extensor and flexor muscle groups, as well as the hamstring to quadriceps (H/Q) ratios of both legs in professional soccer players with dominance on one or both legs.
Forty-two professional soccer players of the first Greek division participated in this study. Participants were divided into 3 groups according to their leg use during training sessions and matches. Fifteen players comprised the first group with dominance to the right leg, 12 players formed the second group with dominance to the left leg, and 15 players consisted the third group with dominance to both the right and left legs. Maximum voluntary concentric torque of the hamstring and quadriceps muscles of both legs was assessed using a Norm isokinetic dynamometer at angular velocities of 12 degrees, 60 degrees, 180 degrees and 300 degrees/s.
No significant differences in the strength balance found between the groups. The isokinetic variables comparing the right and left body side in each group, with dominance on one or both legs, did not differ. No differences were recorded in the H/Q between the right and left legs for any of the subject groups.
There is no evidence of muscle imbalances in extensor and flexor muscle groups and H/Q ratios between the right and left legs in professional soccer players with dominance on one or both legs. The training sessions and matches appear to have imposed strength balance for the right and left body sides of professional soccer players.
单腿优势可能导致对侧肌肉群不对称，并增加肌肉力量较弱一侧腿部受伤的易感性。本研究的目的是检查在单腿或双腿具有优势的职业足球运动员中，双腿伸肌和屈肌组的力量平衡，以及腘绳肌与股四头肌（H/Q）的比率。
42名希腊顶级联赛的职业足球运动员参与了本研究。根据他们在训练课程和比赛中的腿部使用情况，参与者被分为3组。15名运动员组成第一组，以右腿为优势；12名运动员组成第二组，以左腿为优势；15名运动员组成第三组，双腿均有优势。使用Norm等速测力计在12度、60度、180度和300度/秒的角速度下评估双腿腘绳肌和股四头肌的最大自主同心扭矩。
各组之间在力量平衡方面未发现显著差异。在每组中，比较单腿或双腿具有优势的左右身体侧的等速变量没有差异。任何受试组的左右腿之间的H/Q均未记录到差异。
在单腿或双腿具有优势的职业足球运动员中，没有证据表明伸肌和屈肌组以及左右腿之间的H/Q比率存在肌肉失衡。训练课程和比赛似乎为职业足球运动员的左右身体侧施加了力量平衡。
