Table 4 Estimation of oxygen consumption (V̇O2, mL·kg−1·min−1) during Nordic walking (NW) and conventional walking (W) using simple linear regression analysis
From: Estimation of energy expenditure of Nordic walking: a crossover trial
Walking stage (treadmill grade = 0.00) | Linear regression analysis | ||||||||
Stage 1 | Stage 2 | Stage 3 | Constant | Coefficients for speed | R | R2 | |||
Treadmill speed | 50.0 m·min−1 (3 km·h− 1) | 66.7 m·min− 1 (4 km·h− 1) | 83.3 m·min− 1 (5 km·h− 1) | ||||||
V̇O2 NW | 10.9 ± 0.57 | 12.1 ± 0.54 | 14.0 ± 0.64 | 6.16 | 0.09 | 0.497 | 0.247 | ||
V̇O2 W | 9.0 ± 0.38 | 10.1 ± 0.38 | 12.0 ± 0.38 | 4.36 | 0.09 | 0.648 | 0.420 | ||
Walking stage (treadmill speed = 83.3 m·min− 1) | Linear regression analysis | ||||||||
Stage 3 | Stage 4 | Stage 5 | Stage 6 | Stage 7 | Constant | Coefficients for grade | R | R2 | |
Treadmill grade | 0.00 | 0.01 | 0.03 | 0.05 | 0.07 | ||||
V̇O2 NW | 14.0 ± 0.64 | 15.3 ± 0.54 | 16.5 ± 0.51 | 18.6 ± 0.52 | 21.2 ± 0.44 | 13.9 | 99.2 | 0.757 | 0.573 |
V̇O2 W | 12.0 ± 0.38 | 13.0 ± 0.43 | 14.8 ± 0.47 | 16.7 ± 0.39 | 19.0 ± 0.37 | 11.9 | 100.1 | 0.821 | 0.675 |