Figure 2

Isometric stress-length relations and original record of rate of heat production at 3 Hz stimulation. (A) Steady-state isometric stress-length relation of a representative trabecula. The upper and lower broken lines represent the fitted total and passive stress-length relations, respectively. The inset shows the individual twitch stress profiles (in order of decreasing muscle length, a to g). (B) Record of rate of heat production of a representative trabecula undergoing isometric contractions at progressively diminishing muscle lengths (a to g). (C) Average total (upper lines) and passive (lower lines) stress-length relations for the n = 15 Control (thin lines) and n = 12 STZ (thick lines) trabeculae.