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Table 1.

Net metabolic power (W kg–1)

Speed/step lengthWithoutUnpoweredPoweredMode P value (THSD)
0.8 L* (1.00 m s–12.49±0.14 2.86±0.07 2.65±0.12 P=0.008* WO<UNPOW 
1.0 L* (1.25 m s–13.13±0.13 3.39±0.11 3.00±0.10 P=0.001* WO<UNPOW POW<UNPOW 
1.2 L* (1.50 m s–14.22±0.18 4.62±0.22 4.04±0.13 P=0.001* WO<UNPOW POW<UNPOW 
1.4 L* (1.75 m s–17.18±0.50 6.89±0.32 6.19±0.29 P=0.003* POW<UNPOW POW<WO 
Speed/step lengthWithoutUnpoweredPoweredMode P value (THSD)
0.8 L* (1.00 m s–12.49±0.14 2.86±0.07 2.65±0.12 P=0.008* WO<UNPOW 
1.0 L* (1.25 m s–13.13±0.13 3.39±0.11 3.00±0.10 P=0.001* WO<UNPOW POW<UNPOW 
1.2 L* (1.50 m s–14.22±0.18 4.62±0.22 4.04±0.13 P=0.001* WO<UNPOW POW<UNPOW 
1.4 L* (1.75 m s–17.18±0.50 6.89±0.32 6.19±0.29 P=0.003* POW<UNPOW POW<WO 

Values are means ± s.e.m., N=9; see Materials and methods for calculations

Mode: WO, without exoskeletons; UNPOW, unpowered exoskeletons; POW, powered exoskeletons. THSD, Tukey's honestly significant difference. L*,preferred step length at 1.25 m s–1. P<0.05 indicates statistical significance. *Statistical power >0.80

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