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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Exp Physiol. 2016 Mar;101(3):421–431. doi: 10.1113/EP085425

Fig. 3.

Fig. 3

Thermodynamic flow force relation of dynamic bicycling exercise in CF patients (solid square symbols) and their age- and sex-matched controls (open circles). The solid line shows the 3-parameter fit of a sigmoidal function to the covariation of the molar Gibbs free energy of ATP hydrolysis (ΔGp; in kJ/mole) in quadriceps muscle and normalized work rate for the CF patients. Wmax-gym: maximal work rate attained on the ergometer during a separate exercise test outside the MR scanner (r2 0.84). The dotted lines show 95% confidence interval of the fit. Regression equation: y = −14/(1 + (X/79)^9) − 51.