Skip to main content

Table 2 Metabolic power, mechanical power and augmentation for seven subjects

From: Autonomous exoskeleton reduces metabolic cost of human walking during load carriage

   No Device Exoskeleton
Subj. Mass Metabolic Metabolic Augmentation Avg. mech. pow.
(kg) (W) (W) (%) (W)
1 82 397 338 14.6 23.4
2 75 408 378 7.4 NA*
3 84 411 332 19.2 28.5
4 80 330 320 3.1 15.1
5 85 502 513 -2.2 25.1
6 89 428 408 4.7 17.7
7 93 541 486 10.2 26.8
Mean 84 431 396 8.2 22.8
SEM 2 26 29 2.7 2.0
  1. The metabolic power while wearing the exoskeleton is compared to the metabolic power while wearing no device. The net metabolic power is the measured metabolic rate of walking minus the measured metabolic rate of standing. The average mechanical power is estimated by the applied voltage, motor velocity and experimentally determined actuator efficiency. The means and standard error mean (SEM) are presented in the bottom row. *The wireless telemetry malfunctioned for subject 2.