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Fig. 3 | The Journal of Physiological Sciences

Fig. 3

From: Energetics of muscle contraction: further trials

Fig. 3

Heat and work produced, and break-down of PCr during and following a 15-s tetanus at 0 °C. The uppermost graph represents the tension during a typical 15-s isometric tetanus. The physical (h + w) and chemical (PCr) changes are shown in a dimensionless ratio, mol/mol creatine (M/MCr, Cr = total creatine in muscle). The heat plus work (h + w) is plotted in equivalent chemical units (M/MCr) using a conversion factor of 11 kcal/mol (46 kJ/mol) (see text). Muscles (light lines) used for studying changes during contractions were placed in O2, while muscles (heavy lines with ± 1 S.E. bars) used for studying changes during the recovery period had been treated with IAA and were placed in N2 in order to avoid complications arising from the recovery process. Gilbert et al. [2]. Printing errors are corrected and labels added

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