Table 4.

The association between cardiorespiratory fitness (VO_2max) and relative aerobic load (%HRR) at work—stratified by work pace (steps/hour at work)

	Estimates [95% CI]
Work pace (steps/hour)	< 844.6 (n = 110)	844.6–1165.9 (n = 109)	1165.9–1492.7 (n = 110)	> 1492.7 (n = 110)
Mean %HRRa	−0.38 [−0.52 to −0.24]	−0.38 [−0.52 to −0.25]	-0.26 [−0.39 to −0.13]	−0.35 [−0.49 to −0.22]
Max %HRRa	−0.33 [−0.59 to −0.07]	−0.58 [−0.79 to −0.36]	−0.41 [−0.62 to −0.20]	−0.46 [−0.68 to −0.24]
> 30%HRRb	−1.9% [−2.6 to −1.2%]	−1.8% [−2.4 to −1.2%]	−1.4% [−2.2 to −0.8%]	−1.9% [−2.5 to −1.2%]

Bold indicates statistically significant effects (p < 0.05)

HRR heart rate reserve, Max %HRR maximum % of HRR at which an individual has spent at least 1 min at or above during work,  > 30 %HRR percentage of time spent at work above 30 %HRR

^aEstimates are β-coefficients

^bEstimates are the absolute change in the proportion of time spent at work above 30 %HRR