Researchers have investigated the effect of increased cell temperature on the contractility of skeletal muscle and cardiac muscle by heating the muscle proteins using advanced microscopical techniques.
The findings indicated that skeletal muscle is more sensitive to increases in temperature than cardiac muscle, and that heating can rapidly activate the contractile proteins of skeletal muscle, thereby improving muscle performance.Everybody knows the importance of warming up your muscles before a workout.
The research team found that some of the proteins in the muscle cells act as a temperature sensor, and that heating affects skeletal and cardiac contractile systems differently."Our findings point to differences in the temperature sensitivity of proteins responsible for contraction in skeletal vs. cardiac muscles," says co-lead author Kotaro Oyama."Basically, the skeletal muscle that moves our body around is more sensitive to heating than the heart.
This study provides new insights into how, at the protein level, warm-up before exercise enhances muscle performance. The discovery that some muscle proteins act as a temperature sensor may lead to a new hyperthermia strategy, in which skeletal muscle performance is improved by warming up the muscle.
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