Short-term effect of strength training with and without superimposed electrical stimulation on muscle strength and anaerobic Performance. A randomized controlled trial. Part I

Saved in:
Bibliographic Details
Title translated into German:Der kurzfristige Effekt von Krafttraining mit und ohne zusätzlicher Elektrostimulation auf die Muskelkraft und die anaerobe Leistung. Ein randomisierter, kontrollierter Versuch. Teil I
Author:Herrero, Azael J.; Martín, Juan; Martín, Teresa; Abadía, Olaia; Fernández, Beatriz; García-López, David
Published in:Journal of strength and conditioning research
Published:24 (2010), 6, S. 1609-1615, Lit.
Format: Publications (Database SPOLIT)
Publication Type: Journal article
Media type: Print resource
ISSN:1064-8011, 1533-4287
Online Access:
Identification number:PU201103002288


The purpose of this study was to compare strength training with and without superimposed electromyostimulation (EMS) on muscle strength and anaerobic power. Twenty-eight subjects were assigned to: weight + EMS (ES), weight (VOL), or control group (CG). ES and VOL performed 4 training sessions per week during 4 weeks on a knee extension machine (8 sets; 8 repetitions; 1-second concentric phase from 90[degrees] to 0[degrees], 1-second eccentric phase from 0[degrees] to 90[degrees], 1-second rest at 90[degrees]; 3-minute rest between sets; 70% maximal voluntary contraction). Group ES received EMS in the concentric phase of each action (120 Hz, 400 microseconds). Before training, after training, and 2 weeks after the end of the training (detraining), maximal voluntary contraction, squat jump, countermovement jump (CMJ), countermovement jump with free arms (CMJA), and 20-m sprint time were analyzed. After the training period, ES and VOL increased their muscle strength (40.2% and 31.4%, respectively, p < 0.001). After the detraining period, this gain remained above baseline values for ES and VOL (49.1% and 24.5%, respectively, p < 0.001). Changes in muscle strength between baseline and detraining were higher in ES than in VOL (p < 0.01). Anaerobic performance was not affected by training in any group, but percentage change between baseline and after training suggests that the CMJ and CMJA with free arms performance were impaired in ES with respect to VOL and CG. Superimposed EMS onto voluntary contractions increases strength more than voluntary training alone; nevertheless, a detraining period should be respected to observe this delayed adaptation. To improve anaerobic power with superimposed EMS, a complementary and specific work such as plyometrics should be carried out. Verf.-Referat