Figure 4. Center of mass mechanical efficiency.
a) Group average pre-exo-therapy (red), group average post-exo-therapy (blue), and typical unimpaired (gray) potential energy (PE, solid lines) and kinetic energy (KE, dashed lines) curves. Pie charts indicate the group average center of mass (COM) energy exchange recovery percentage; For efficient energy exchange and increased recovery, potential and kinetic energies should be 180ยบ out of phase with equal and opposite amplitudes. The typical, unimpaired curve was adopted from Bennett et al [6].