Acute effect of electrical muscle elongation and static stretching in hamstring muscle extensibility

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• 作者：L. Espejo-Ant&uacute ; nez^a ; ^{luisea@unex.es" class="auth_mail" title="E-mail the corresponding author} ; P.A. L&oacute ; pez-Miñ ; arro^b ; M. Albornoz-Cabello^c ; E.M. Garrido-Ardila^a
• 关键词：Muscle stretching ; Electric current ; Range of movement
• 刊名：Science & Sports
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：31
• 期：1
• 页码：e1-e7
• 全文大小：924 K

文摘

The acute effect of electrical muscle elongation (EME) versus static stretching (SS) on hamstring extensibility was analyzed.

c_2">Material and methods

Sixty-three adult athletes with reduced hamstring flexibility (straight leg raise test angle < 80°) were randomly assigned to: group 1 (one EME session of 4 kHz interferential current, bipolar technique and AMF = 100 Hz, n = 21), group 2 (one set of SS, n = 21) or group 3 (control group, n = 21). The hamstring muscle extensibility was assessed immediately before and after the intervention with the passive knee extension test.

c_3">Results

Significant improvements (p < 0.05) were found in both EME (+10.09°) and SS (+8.61°) groups whereas no significant changes were detected in control group (+0.09°). Although no significant differences were found between EME and SS groups, the EME group showed large effect size (d = 0.927) while SS group reached medium effect size (d = 0.571).

c_4">Conclusions

The use of electrical muscle stimulation in adult athletes with restricted hamstring extensibility can achieve immediate improvements in hamstring extensibility, slightly higher than those gained with static stretching.