Key result
Daily physical training increases cardiac myosin Ca++-ATPase activity up to ~30% versus sedentary controls.
Why the study?
The effects of physical training on cardiac myosin ATPase activity and its biochemical properties were investigated to understand exercise-induced cardiac adaptations.
Population
Rats exercised 90 or 150 min daily for 8 weeks and matched sedentary controls
Comparison
Exercised rats vs sedentary controls
Design
Experimental study comparing biochemical activity of cardiac myosin
Follow-up
8 weeks
Authors
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Should not change exercise recommendations; hypothesis-generating for myosin ATPase as a cardiac training adaptation.
Bhan et al. (1975) studied this question. Physical training vs. Matched sedentary controls was evaluated on Ca++-ATPase activity. Physical training for 90 or 150 minutes daily for 8 weeks increased cardiac myosin Ca++-ATPase activity by 17% and 30%, respectively, compared to sedentary controls.
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