Is neuromuscular inhibition detectable in elite footballers during the Nordic hamstring exercise?

被引:8
作者
Blandford, Lincoln [1 ]
Theis, Nicola [2 ]
Charvet, Ingrid [3 ]
Mahaffey, Ryan [1 ]
机构
[1] St Marys Univ, Sch Sport Hlth & Appl Sci, Twickenham TW1 4SX, England
[2] Univ Gloucestershire, Sch Sport & Exercise, Gloucester, England
[3] UCL, Dept Civil Environm & Geomat Engn, London, England
关键词
Hamstring injury recurrence; Activation ratios; STRAIN INJURY; PROFESSIONAL FOOTBALL; BICEPS FEMORIS; MUSCLE; STRENGTH; MECHANICS; EXTENSOR; POSITION; PLAYERS; SOCCER;
D O I
10.1016/j.clinbiomech.2018.07.009
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Background: The presence of neuromuscular inhibition following injury may explain the high incidence of biceps femoris injury recurrence in elite (soccer) footballers. This phenomenon may be detectable in elite players during the Nordic hamstring exercise. Thus, the first purpose of this study was to assess biceps femoris muscle activation during this exercise in players with hamstring injury history. Additionally, following injury, observed increases in synergistic muscle activation may represent a protective mechanism to the presence of neuromuscular inhibition. Thus, the second purpose was to identify if the relative contributions of biceps femoris, and its synergists reflected a post-injury pattern of activation suggestive of these potentially compensatory neural mechanisms. Methods: Ten elite players with a history of hamstring injury and ten elite players without a history of hamstring injury, completed six repetitions of the Nordic hamstring exercise. During each trial, biceps femoris, semitendinosus and gluteus maximus muscle activations were collected at 90-30 degrees and 30-0 degrees of knee flexion. Findings: Biceps femoris activation was significantly higher at 90-30 degrees of knee flexion compared to 30-0 degrees (P < 0.001) but did not differ between the groups. In players with a history of injury, muscle activation ratios for the biceps femoris/semitendinosus (P = 0.001) and biceps femoris/gluteus maximus (P = 0.023) were significantly greater at 30-0 degrees of knee flexion than in the control group. Interpretation: Neuromuscular inhibition of the biceps femoris was not detected during the exercise within elite footballers, yet the relative contributions of biceps femoris and its synergists appear to change following injury.
引用
收藏
页码:39 / 43
页数:5
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