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Fig. 6. Comparison of mechanical variables across C (black bars), U (pale grey
bars) and V (dark grey bars) treatments, with U trials subdivided into energy
exchange modes. Values are means ± s.e.m for all instances of each
response. Initial horizontal velocity (Vi,h) was measured
at the COM apex during the flight phase prior to the measured step (`begin'
point in Fig. 3B). The net
change in COM height (
sv) was determined over the
time interval illustrated in Fig.
3B. The other mechanical variables were measured over the period
of ground contact.