Table 2 Additional test-retest results for power output, oxygen uptake (VO), and Ratings of Perceived Exertion (RPE) during the Aerobic Power Index submaximal aerobic exercise test (n = 18).
Power output (W·kg-1) VO2 (ml·kg-1·min-1) RPE
Test 1 Test 2 Test 1 Test 2 Test 1 Test 2
Mean (± SD) 1.31 (.43) 1.32 (.41) 14.19 (4.00) 14.69 (3.82) 12.39 (2.07) 12.40 (2.37)
Confidence intervals
   Lower bound -.92 -1.25 -.85
   Upper bound .06 .24 .81
Paired t-test (two-tailed) p = .75 p = .18 p = .96
TEM .11 1.18 1.0
Relative TEM (%) 8.65% 7.37% 9.57%
Intra-class Correlation 0.96 0.96 0.83
LOG (bias ± random error) -.01 ± .32 -.02 ± 3.29 -.50 ± 2.95
TEM: technical error of measurement