Table 2. Effects of cycling cadence and intensity on power, blood glucose and lactate, respiratory exchange ratio (RER), heart rate, oxygen uptake (VO), rating of perceived exertion (RPE), energy expenditure and gross efficiency. Data are means (± SD).
80 RPM 100 RPM
65% VO2 max 80% VO2 max 65% VO2 max 80% VO2 max
Power (W) 223 (42) 292 (34) 223 (42) 292 (34)
Glucose (mmol·L-1) 5.4 (.5) 5.3 (.6) 5.4 (.4) 5.3 (.4)
Lactate (mmol·L-1) 1.2 (03) 2.6 (.7) * 1.5 (.5) 3.2 (1.4) *
RER .88 (.03) .94 (.01) * .88 (.02) .96 (.02) *
Heart rate (bpm) 135 (11) 158 (10) * 140 (12) 163 (11) *
VO2 (L·min-1) 2.86 (0.53) 3.67 (0.44) * 3.05 (0.54) 3.82 (0.50) *
RPE (0-10 scale) 3.8 (1.5) 6.5 (1.0) * 3.9 (1.5) 6.8 (1.2) *
Energy expenditure (kcal.min-1) 14.3 (2.7) 18.3 (2.2) * 15.2 (2.7) 19.1 (2.5) *
Gross efficiency (%) 22.8 (1.0) 23.1 (0.7) 21.3 (4.5) 22.1 (0.9) *
* p <0.05 vs. 65% VO max
† p<0.05 vs. 80 RPM, (n = 8)