Fig. 4. (A) Efficiency ratio (=work done/extra CO2 produced by the muscle) during the control trials for the experiments investigating the effects of varying stimulus intensity. Each of the symbols is the mean of the value in the control trial preceding and in that following the trials with altered stimulus intensity. (B) The efficiency ratio and the average power output, each relative to that in the preceding and following control trials, when the muscle was stimulated with shocks of reduced amplitude. (C) Relative efficiency and power when the muscle was stimulated with shocks twice as large as those in the control trials. Results from the same preparation are identified by a common symbol in A–C.
