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Fig. 3. The mean vertical (VGRF, squares), propulsive
(+HGRF, triangles) and breaking
(-HGRF, circles) forces in xBW
versus acceleration. During accelerations, both
VGRF and +HGRF increased with
acceleration; however, the trend for VGRF was not
significant (r2=0.93, P<0.0001;
r2=0.23, P=0.072, respectively). During
decelerations, only -HGRF was significantly correlated
with acceleration (r2=0.89, P<0.0001).