Fig 1.
PRISMA flowchart.
Table 1.
Characteristics of the studies included in the systematic review and meta-regression.
Table 2.
Mean (SD) for measures of relative and absolute exercise intensity from each study included in the systematic review and meta-regression.
Fig 2.
The agreement between absolute and relative measures of moderate-to-vigorous exercise intensity when based on raw data from three studies [35, 36, 51].
Fig 3.
Bayesian random intercept logistic regression.
The number of data points = 1257 due to each participant contributing multiple data points from multistage incremental tests. Please note that 5 data points for %HRR are above 100%, which is physiologically implausible. However, these are the data we obtained from the authors.