Figure 3: Exercise capacity is reduced in subjects with cardiac parasympathetic dysfunction.

(a) Schematic of the CPET protocol in humans. Percentage of predicted peak oxygen consumption (b), AT (c) and percentage of predicted work rate (d) in subjects (n=1,293), stratified by the speed of HRR 1 min after cessation of CPET. Numbers of subjects are shown within bars. Data are presented as means±s.e.m. *P<0.001 (ANOVA).