Comparison of recovery strategies on maximal force-generating capacity and electromyographic activity level of the knee extensor muscles

Zarrouk, Nidhal, Rebai, Haithem, Yahia, Abdelmoneem, Souissi, Nizar, Hug, Francois and Dogui, Mohamed (2011) Comparison of recovery strategies on maximal force-generating capacity and electromyographic activity level of the knee extensor muscles. Journal of Athletic Training, 46 4: 386-394.

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Author Zarrouk, Nidhal
Rebai, Haithem
Yahia, Abdelmoneem
Souissi, Nizar
Hug, Francois
Dogui, Mohamed
Title Comparison of recovery strategies on maximal force-generating capacity and electromyographic activity level of the knee extensor muscles
Journal name Journal of Athletic Training   Check publisher's open access policy
ISSN 1062-6050
1938-162X
Publication date 2011-07-01
Year available 2011
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 46
Issue 4
Start page 386
End page 394
Total pages 9
Place of publication Dallas, TX United States
Publisher National Athletic Trainers Association
Collection year 2012
Language eng
Formatted abstract
Context: With regard to intermittent training exercise, the effects of the mode of recovery on subsequent performance are equivocal.

Objective: To compare the effects of 3 types of recovery intervention on peak torque (PT) and electromyographic (EMG) activity of the knee extensor muscles after fatiguing isokinetic intermittent concentric exercise.

Design:
Crossover study. Setting: Research laboratory. Patients or Other Participants: Eight elite judo players (age = 18.4 ± 1.4 years, height = 180 ± 3 cm, mass = 77.0 ± 4.2 kg). Intervention(s): Participants completed 3 randomized sessions within 7 days. Each session consisted of 5 sets of 10 concentric knee extensions at 80% PT at 120°/s, with 3 minutes of recovery between sets. Recovery interventions were passive, active, and electromyostimulation. The PT and maximal EMG activity were recorded simultaneously while participants performed isokinetic dynamometer trials before and 3 minutes after the resistance exercise.

Main Outcome Measure(s):
The PT and maximal EMG activity from the knee extensors were quantified at isokinetic velocities of 60°/s, 120°/s, and 180°/s, with 5 repetitions at each velocity. Results: The reduction in PT observed after electromyostimulation was less than that seen after passive (P <.001) or active recovery (P <.001). The reduction in PT was less after passive recovery than after active recovery (P <.001). The maximal EMG activity level observed after electromyostimulation was higher than that seen after active recovery (P <.05).

Conclusions: Electromyostimulation was an effective recovery tool in decreasing neuromuscular fatigue after highintensity, intermittent isokinetic concentric exercise for the knee extensor muscles. Also, active recovery induced the greatest amount of neuromuscular fatigue.
Keyword Peak torque
Isokinetic exercises
Concentric exercises
High intensity intermittent exercises
Passive Recovery
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Health and Rehabilitation Sciences Publications
 
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Created: Thu, 29 Aug 2013, 02:08:17 EST by Francois Hug on behalf of School of Health & Rehabilitation Sciences