Table 2

Exercise Performance

Control Values
(n = 26)
HFpEF
(n = 20)
p Value
Exercise time (s)840 ± 239495 ± 210<0.001
Peak workload (W)93 ± 2755 ± 23<0.001
Peak VO2 (ml/kg/min)18.6 ± 3.312.7 ± 3.2<0.001
% Predicted peak VO2 (%)94 ± 2257 ± 19<0.001
Peak respiratory exchange ratio1.09 ± 0.071.05 ± 0.090.11
VO2 at VAT (ml/kg/min)14.2 ± 2.510.4 ± 2.3<0.001
VE/VCO2 slope33.5 ± 3.036.0. ± 5.00.05
20-W Borg effort (6–20)8.6 ± 1.411.3 ± 2.4<0.001
20-W Borg dyspnea (0–10)0.8 ± 0.72.8 ± 1.5<0.001
Peak Borg effort (6–20)16.2 ± 1.815.7 ± 2.20.45
Peak Borg dyspnea (0–10)5.2 ± 1.95.5 ± 2.00.61

Values are mean ± SD. Final column reflects 2-tailed unpaired t-test.

VAT = ventilatory anaerobic threshold; VE = minute ventilation; VCO2 = carbon dioxide production; VO2 = oxygen consumption.