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Figure 7


Fig. 7. Normal curve sprinting velocity data from all subjects plotted with velocities predicted by theory (Greene, 1985; Greene, 1987). Normalized velocity (V/Vo) plotted against a dimensionless radius (Rg/V2o) for normal curve sprinting (A) and the same data plotted after being transformed to negative log–log coordinates (B). This negative log transformation allows for ease of comparing slopes of our data against theory. Our data fit to a power curve with a significantly higher exponent than both of Greene's 1985 predictions (P<0.05) and smaller than Greene's 1987 predictions (P<0.05). Our data provide the following fit: V/Vo=0.746 (Rg/V2o)0.363±0.012. Greene's 1985 theory for small radii [for Rg/V2o<0.25, thin broken line; equation 42 in Greene (Greene, 1985)] predicted a relationship of: V/Vo=(Rg/V2o)0.333. Greene's theory for large radii [for Rg/V2o<1, thin dotted lines; equation 12 in Greene (Greene, 1985)] predicted a relationship of V/Vo=0.879 (Rg/V2o)0.258. Greene's 1987 theory [for ß=0.27, thick dotted lines; equation 20 in Greene (Greene, 1987)] predicted a relationship of V/Vo=0.234 (Rg/V2o)0.812 or [for ß=1.75, equation 20 in Greene (Greene, 1987)] predicted a relationship of V/Vo=0.505 (Rg/V2o)0.903.





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