Key result
Mean power outputs from 4-minute and 20-minute field time-trials showed strong reproducibility (R=0.98) and correlated significantly with laboratory graded exercise test measures (p<0.001).
Population
15 competitive male cyclists
Comparison
4 min and 20 min time-trials on flat roads using… vs Laboratory graded exercise test (GXT)
Design
Cross-sectional
Authors
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May support field time-trials for aerobic assessment in cyclists; leaves open utility for guiding training or predicting outcomes.
Observational (n=15)
Effect estimate: R=0.98 (95% CI 0.92-0.99)
p-value: p=<0.001
TT4 and TT20 mean power outputs are reliable predictors of aerobic endurance in competitive cyclists.
Nimmerichter et al. (2009) conducted an observational in Elite cyclists (n=15). 4-minute (TT4) and 20-minute (TT20) field time-trials vs. Laboratory graded exercise test (GXT) was evaluated on Reproducibility of power output and relationship with laboratory performance markers (R=0.98, 95% CI 0.92-0.99, p=<0.001). Mean power outputs from 4-minute and 20-minute field time-trials showed strong reproducibility (R=0.98) and correlated significantly with laboratory graded exercise test measures (p<0.001).
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