Prolonged contraction duration in aged myocardium. Progressive changes from young adult age to senescence in mRNA for rat cardiac myosin heavy chain genes. Intracellular calcium transients and developed tensions in rat heart muscle. A mechanism for the negative interval-strength relationship. Experimental models which mimic the differentiation and dedifferentiation of vascular cells.
Chronic exercise prevents characteristic age-related changes in rat cardiac contraction.
Enhanced calcium uptake of cardiac sarcoplasmic reticulum in exercise-trained old rats.