Muscle Strength

Updated: Oct 18, 2018


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In a study on the effect of low-intensity exercise training using electrical stimulation, Miyamoto, Kamada and Tamaki investigated muscle strength and cardiorespiratory fitness in healthy people (Miyamoto, Kamada, & Tamaki, 2016). They picked nineteen healthy individuals to build two groups: one control, the other intervention. Participants in both groups kept regular physical activity while the intervention group underwent 30 min. belt electrode skeletal muscle (B-SES) training at 3-4 Metabolic Equivalent of Tasks (METs) for four weeks. The MET, or simply metabolic equivalent, is a physiological measure expressing the energy cost of physical activities and is defined as the ratio of metabolic rate (and therefore the rate of energy consumption) during a specific physical activity to a reference metabolic rate, set by convention to 3.5 ml O2·kg−1·min−1 (Metabolic equivalent, 2108).

The knee extensor muscle strength and cardiorespiratory endurance during incremental exercise test were measured during four-week study time. The research team found the relative change of knee extensor muscle strength in the intervention group, who used electrical muscle stimulation, was significantly higher than control group. Also, oxygen uptake at ventilator threshold and peak oxygen uptake during incremental exercise test significantly increased in the intervention group when compared with the control group. As a result, the study showed that prolonged low-intensity electrical muscle stimulation induces significant increases in muscle strength and cardiorespiratory fitness .


References:


Metabolic equivalent. (2108, July 12). Retrieved from Wikipedia: https://en.wikipedia.org/wiki/Metabolic_equivalent

Miyamoto, T., Kamada, H., & Tamaki, A. (2016). Low-intensity electrical muscle stimulation induces significaant increases in muscle strength and cardiorespiratory fitness. European Journa of Sport Science , 1104-1110.

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