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. Author manuscript; available in PMC: 2012 Mar 15.
Published in final edited form as: J Biomech. 2011 Feb 18;44(5):789–793. doi: 10.1016/j.jbiomech.2011.01.030

Table 2.

Positive and negative mechanical work at the hip joint performed by the total hip (biological muscle and exoskeleton) and by the exoskeleton alone during the passive condition and during the last 15 minutes of the powered condition. The total hip negative work is significantly lower in the powered condition compared to the passive condition (*).

Passive Powered Adjusted p-value
Total hip
   Positive work (W/kg) 0.18 ± 0.04 0.16 ± 0.03 0.272
   Negative work (W/kg) 0.20 ± 0.10 0.15 ± 0.09 0.002*
Exoskeleton
   Positive work (W/kg) < 0.01 0.02 ± 0.01 N/A
   Negative work (W/kg) < 0.01 0.02 ± 0.01 N/A