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Table 3 Net Metabolic Rate

From: Characterizing the relationship between peak assistance torque and metabolic cost reduction during running with ankle exoskeletons

Assistance condition

Net metabolic rate (W/kg)

Metabolic rate reduction (% of ZT)

Normal shoes

8.76 ± 0.42

12.2 ± 2.7%

Zero torque

9.99 ± 0.66

0.2 Nm/kg

9.20 ± 0.59

7.7 ± 1.6%

0.4 Nm/kg

8.50 ± 0.57

15.2 ± 2.3%

0.6 Nm/kg

7.85 ± 0.56

20.6 ± 1.4%

0.8 Nm/kg

7.56 ± 0.70

24.8 ± 2.3%

  1. Net metabolic rate (quiet standing rate subtracted) decreased with increased peak torque magnitude. The metabolic rate reduction is reported as a percentage of zero torque from the same validation