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Table 5 Estimation of oxygen consumption (O2, mL·kg−1·min−1) during Nordic walking (NW) and conventional walking (W) using multiple linear regression analysis

From: Estimation of energy expenditure of Nordic walking: a crossover trial

   Model coefficients Overall model fit
Estimate t P-value R R2 Adjusted R2 P-value
O2 NW Constant 6.14 4.38 < 0.001 0.852 0.725 0.720 < 0.001
Speed 0.09 4.78 < 0.001
Speed × grade 1.19 10.97 < 0.001
O2 W Constant 4.39 4.24 < 0.001 0.911 0.829 0.826 < 0.001
Speed 0.09 6.26 < 0.001
Speed × grade 1.20 14.88 < 0.001