Abstract 29

Repeated measures of VO2 l/min (SD) recorded concurrently using Douglas bags and the Metamax-3B at rest and during exercise. Bias and 95% limits of agreement (bias ± LA) describe the repeatability of each system (V1 v V2) and their concurrent validity (DB v MM)

50W100W
SystemRestingCyclingRestingCycling
cv%, coefficient of variation; DB, Douglas Bags; MM, Metamax 3B
Douglas bags
    Visit 10.27 (0.05)0.98 (0.08)0.28 (0.05)1.52 (0.04)
    Visit 20.29 (0.05)1.00 (0.07)0.30 (0.03)1.52 (0.05)
V1 v V2 (bias ± LA) cv%−0.02 ± 0.083 10.6%−0.02 ± 0.10 3.6%−0.02 ± 0.017 18.7%0.008 ± 0.135 2.9%
Metamax 3B
    Visit 10.30 (0.07)0.97 (0.09)0.31 (0.05)1.48 (0.03)
    Visit 20.33 (0.07)1.03 (0.12)0.33 (0.06)1.50 (0.09)
V1 v V2 (bias ± LA)−0.025 ± 0.060−0.060 ± 0.076−0.007 ± 0.052−0.017 ± 0.142
    cv%8.4%4.9%5.8%3.2%
DB v MM (bias ± LA)−0.032 ± 0.059−0.008 ± 0.135−0.006 ± 0.0790.033 ± 0.133