Fig 5.

Exercise in a trained canine model elicited similar results with NOS1 inhibition on myocyte contraction. Summary data of Ca²⁺ transient amplitudes (A), Ca²⁺ transient RT₅₀ (B), shortening amplitudes (C), relengthening RT₅₀ (D), SR Ca²⁺ load (E), and SR Ca²⁺ fractional release (F) in exercise (Ex-grey) and sedentary (Sed- black), (±acute NOS1 inhibition, SMLT, striped), n = 10-33 cells/3-4 hearts, *P< 0.05 vs corresponding Sed.