Figure 4

Significant interaction for peak ankle dorsiflexion moment in early stance found in model #1 (A), model #2 (B), model #3 (C), model #4 (D). In A and B, patients with COPD remain relatively stable and healthy controls change from REST to NO REST condition, increasing (becoming more negative) their peak ankle dorsiflexion moment. In C and D, patients with COPD have been stratified for disease severity and again, there is a similar pattern. Both mild/moderate and severe/very severe COPD patients maintain a similar peak ankle dorsiflexion moment from REST to NO REST conditions whereas, the healthy controls increase (become more negative) in NO REST.