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Table 2.

Average mechanical power over the full gait cycle

Power (W kg–1)–20%–10%Preferred+10%+20%
Summed      
   Positive 0.67±0.08 0.66±0.07 0.72±0.13 0.75±0.11 0.85±0.13 
   Negative 0.37±0.12 0.36±0.05 0.37±0.06 0.44±0.07 0.51±0.09 
Hip      
   Positive 0.23±0.07 0.24±0.06 0.28±0.07 0.33±0.09 0.39±0.09 
   Negative 0.04±0.03 0.04±0.03 0.03±0.03 0.04±0.04 0.03±0.03 
Knee      
   Positive 0.07±0.04 0.08±0.03 0.12±0.06 0.13±0.06 0.15±0.07 
   Negative 0.18±0.06 0.18±0.03 0.20±0.06 0.24±0.03 0.31±0.07 
Ankle      
   Positive 0.37±0.09 0.34±0.06 0.32±0.08 0.29±0.07 0.30±0.09 
   Negative 0.15±0.05 0.13±0.04 0.14±0.04 0.16±0.04 0.17±0.05 
Power (W kg–1)–20%–10%Preferred+10%+20%
Summed      
   Positive 0.67±0.08 0.66±0.07 0.72±0.13 0.75±0.11 0.85±0.13 
   Negative 0.37±0.12 0.36±0.05 0.37±0.06 0.44±0.07 0.51±0.09 
Hip      
   Positive 0.23±0.07 0.24±0.06 0.28±0.07 0.33±0.09 0.39±0.09 
   Negative 0.04±0.03 0.04±0.03 0.03±0.03 0.04±0.04 0.03±0.03 
Knee      
   Positive 0.07±0.04 0.08±0.03 0.12±0.06 0.13±0.06 0.15±0.07 
   Negative 0.18±0.06 0.18±0.03 0.20±0.06 0.24±0.03 0.31±0.07 
Ankle      
   Positive 0.37±0.09 0.34±0.06 0.32±0.08 0.29±0.07 0.30±0.09 
   Negative 0.15±0.05 0.13±0.04 0.14±0.04 0.16±0.04 0.17±0.05 

Values for positive and negative power are means ± s.d.(N=10). Preferred is the preferred stride rate condition; negative values represent stride rates lower than preferred, and positive values represent stride rates higher than preferred. For negative powers the magnitudes are shown. Data are presented for a single limb. The first two rows(Summed) are positive and negative powers summed over the hip, knee and ankle joints, and were the quantities used in computing net mechanical efficiency

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