Figure 4

Stance phase data (from the Forefoot Trial) of mechanical power and work production within subareas of the foot: distal to forefoot (red), mid-tarsal joint (turquoise), summed midtarsal joint and distal to forefoot (gray), and distal to hindfoot (blue). The mid-tarsal joint generated substantial positive power and work during push-off (last ~20% of sdtance), while at the same time, the structures distal to the forefoot performed negative power and work. Overall, all structures distal to the hindfoot produced net negative work.