Effect of Pre-Exercise Sweep Frequency Interferential Current Therapy on the Biceps Brachia Muscle Fatigue in Normal Healthy Male Subjects. A Randomized Placebo Control Trial
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- Category: Vol. 84, December 2016
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Effect of Pre-Exercise Sweep Frequency Interferential Current Therapy on the Biceps Brachia Muscle Fatigue in Normal Healthy Male Subjects. A Randomized Placebo Control Trial, ABEER A. YAMANY
Abstract
Background: Skeletal muscle fatigue is one of the most common problems encountered in general practice clinic population and sport activities. Interferential currents therapy is widely used by physiotherapists throughout the world to manage a range of musculoskeletal condition.
Objective: To find out the effect of pre-exercise sweep frequency interferential currents therapy on the induced fatigue of Biceps brachia muscle in normal healthy untrained male subjects.
Subjects and Methods: Twenty healthy male subjects were participated and randomly allocated to receive two treatment sessions of interferential currents therapy before inducing biceps brachia muscle fatigue with 7 days apart. Active inter-ferential currents session with trapezoid sweep frequency thatset between a low beat frequency of 5Hz and a high beat frequency of 1 10Hz for thirty minutes and placebo interferential currents session. After the treatment session each subject was asked to perform voluntary elbow flexion repetitions with 30% of their one repetition maximum using dumbbells until they reached fatigue determined by inability to reach 90 degrees of elbow flexion. Pain intensity level before and after reaching fatigue was measured by visual analogue scale, number of concentric contraction before fatigue and time elapsed to reaching fatigue point were measures for all subjects in the two sessions.
Results: A significant difference (p£0.05) was found between active and placebo interferential currents sessions, when the means ± SD of the two sessions were compared in a terms of pain intensity level, number of submaximal repeti-tions and time elapsed to reach biceps brachia muscle fatigue in favour of active interferential currents.
Conclusion: The application of sweep frequency interfer-ential current with the used parameterscould be effective in delaying the development of skeletal muscle fatigue and enhancing skeletal muscle performance.