1. Effect of lower limb massage on electromyography and force production of the knee extensors.
- Author
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Hunter AM, Watt JM, Watt V, and Galloway SD
- Subjects
- Adult, Biomechanical Phenomena, Electromyography methods, Humans, Knee physiology, Male, Physical Education and Training methods, Recruitment, Neurophysiological, Reflex, Stretch physiology, Lower Extremity physiology, Massage, Muscle Contraction physiology, Muscle, Skeletal physiology
- Abstract
Objective: To evaluate the effect of massage on force production and neuromuscular recruitment., Methods: Ten healthy male subjects performed isokinetic concentric contractions on the knee extensors at speeds of 60, 120, 180, and 240 degrees /s. These contractions were performed before and after a 30 minute intervention of either rest in the supine position or lower limb massage. Electromyography (EMG) and force data were captured during the contractions., Results: The change in isokinetic mean force due to the intervention showed a significant decrease (p<0.05) at 60 degrees /s and a trend for a decrease (p = 0.08) at 120 degrees /s as a result of massage compared with passive rest. However, there were no corresponding differences in any of the EMG data. A reduction in force production was shown at 60 degrees /s with no corresponding alteration in neuromuscular activity., Conclusions: The results suggests that motor unit recruitment and muscle fibre conduction velocity are not responsible for the observed reductions in force. Although experimental confirmation is necessary, a possible explanation is that massage induced force loss by influencing "muscle architecture". However, it is possible that the differences were only found at 60 degrees /s because it was the first contraction after massage. Therefore muscle tension and architecture after massage and the duration of any massage effect need to be examined.
- Published
- 2006
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