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Table 3 Oxygen consumption (O2, mL·kg− 1·min− 1) at each walking stage during Nordic walking (NW) and conventional walking (W)

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

Walking stage Treadmill speed (km·h− 1) Treadmill grade (%) O2 NW O2 W ΔO2 (%O2) P-value
Stage 1 3 0 10.9 ± 2.2 9.0 ± 1.5 1.9 (20.9) <.01
Stage 2 4 0 12.1 ± 2.1 10.1 ± 1.5 2.0 (19.3) <.01
Stage 3 5 0 14.0 ± 2.5 12.0 ± 1.5 2.0 (16.2) <.01
Stage 4 5 1 15.3 ± 2.1 13.0 ± 1.6 2.3 (17.4) <.01
Stage 5 5 3 16.5 ± 2.0 14.8 ± 1.8 1.7 (11.6) <.01
Stage 6 5 5 18.6 ± 2.0 16.7 ± 1.5 1.8 (10.9) <.01
Stage 7 5 7 21.2 ± 1.7 19.0 ± 1.4 2.1 (11.3) <.01
  1. ΔO2 = O2NW – O2W
  2. %O2 = (O2NW – O2W) / O2W × 100