Table 3: The effect (unstandardized regression coefficients (P value)) of walking speed, age, and body weight on metabolic cost and accelerometer counts during treadmill walking at 2, 3, 4, 5, and 6 km/h.

METs (L/min) (mL/kg/min)Counts/min*

Walking speed (km/h) (1st order)−0.002 (.971)0.004 (.852)−0.044 (.770)1006.662 (<.001)
Walking speed (km/h) (2nd order)0.136 (<.001)0.049 (<.001)0.415 (<.001)
Age0.025 (.041)0.007 (.031)0.060 (.015)−27.439 (.027)
Body weight0.003 (.582)0.013 (<.001)0.004 (.747)2.437 (.672)

* The second order term of walking speed was omitted due to a nonsignificant association with the dependent variable.