Table 1. The mean peak values (±standard deviations) and effect sizes for the various parameters monitored during each test protocol.
Peak values INCS+I INCI INCs GXP INDXP Cohen's d (Range)
Oxygen uptake [mL·min–1] 4900(402) 4930(356) 4850(384) 4670(469) a 4830(426) .06 - .61
Oxygen uptake [mL·min1·kg–1] 62.2 (5.2) 63.1 (3.3) 61.8 (4.3) 59.5 (4.3) a 61.5 (4.5) .07 - .94
Ventilation [L·min–1] 158 (17 ) 161(17) 156(18) 152(18) 161(15) .00 - .54
Respiratory exchange ratio 1.18 (.06) b 1.24 (.10) 1.19 (.06) b 1.21 (.07) 1.23 (.08) .11 - .73
Heart rate [bpm] 189(11) 189(9) 190(9) 190(10) 189(10) .00 - .11
Blood lactate [mmol·L1] 7.67 (2.55) 8.44 (2.26) 7.59 (2.74) 7.17 (2.09) 8.47 (2.65 .01 - .54
Ratings of perceived exertion 18(1) 19(1) 18(1) 18(1) 19(1) .00-1.00
Time to exhaustion [min: sec] 10:54 (1:30) c,d 7:30 (1:12) c 7:18 (1:06) c 25:30 (3:00) c 9:48 (:54) c,d .09-8.05
S = increase in speed; I = increase in inclination; INC = incremental test; GXP = step test; INDXP = open individual protocol.
a p < 0.01 in comparison to the corresponding values for all of the ramp tests (INCs+I, INCS, INCI, INDXP).
b p < 0.05 for INCs versus INCI, INCS+I versus INDXP and INCS+I versus INCI.
c p < 0.01 for the GXP versus all ramp tests, INCS versus INDXP and INCS+I, and INCI versus INDXP and INCS+I.
d p < 0.05 for INDXP versus INCS+I. (RER = respiratory exchange ratio, RPE = rating of perceived exertion).