would result in a 4-pound reduction in a knee-joint load that peaks at 650 pounds for each step.
Knee moments. The significant (P 0.03) positive beta coefficient for knee abduction moment indicates that a reduction in body mass was associated with a decreased peak knee abduction moment. The beta co- efficient for followup mass indicates that for every 1 kg reduction in body mass from baseline to followup, the followup peak abduction moment was reduced 0.496 Nm (Table 3). With an average peak baseline abduction moment of 33.52 Nm, a 9.8N (1 kg) reduction in body weight would result in a 1.4% reduction in knee abduc- tion moment.
Likewise, the significant (P 0.03) positive beta coefficient for knee medial rotation moment indicates that for every 1 kg reduction in followup mass, the followup medial rotation moment was reduced 0.31 Nm. The average baseline value for peak medial rotation moment was 18.45 Nm; therefore, the ratio of reduction in medial rotation moment for a 9.8N (1 kg) reduction in body weight would result in a 1.6% reduction in knee medial rotation moment.