Table 3.

Relationships between independent variable (work vibration) and dependent variable (workload).

Model 1-1: independent variable	Dependent variable: %HRRa
	Estimated	SE	t valueb	P value
VDVc	0.0008	0.0003	3.29	.002
Intercept	5.469	1.07	5.11	<.001
Multiple R2d	0.213	—e	—	—
Adjusted R2	0.193	—	—	—
F static valuef	10.8	—	—	.002

^aHRR: heart rate reserve.

^bt value: result of the student t test.

^cVDV: vibration doses value.

^dR²: coefficient of determination.

^eNot available

^fF static value: variance ratio.