Fig. 4
From: Strength training improves heart function, collagen and strength in rats with heart failure
Effect of increasing the concentration of calcium in the nutrient solution on the contractile parameters of the isolated papillary muscle in the control (C, n = 10), infarcted (MI, n = 9) and infarcted and trained (MIT, n = 9) groups. In A-C, the effects on developed tension, maximal positive (+ dT/dtmax) and negative (-dT/dtmax) time-derivatives of tension are represented. In D–F, the percent of increase in respective contractile parameters as result of the increasing calcium concentration. Two-way ANOVA plus Tukey’s post hoc test in A–C (*p < 0.05 vs. Ca2+ 1.5 mM, †p < 0.05 vs. C, ‡p < 0.05 vs. MI) and 1-way ANOVA plus Tukey’s post hoc test in D–F (†p < 0.05 vs. C, ‡p < 0.05 vs. MI). Symbols and bars represent mean ± SEM