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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.