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Fig. 6. (A) Vertical (solid lines) and horizontal (broken lines) velocity squared
(v2) at the moment of body contact against arm angle at
touchdown. The effect of a change in height h of the jump becomes
visible in the difference between the colours. Optimal arm angle is defined as
the arm angle for which both v2 are minimal (at the
intersection of the solid and the broken lines) and is shown for each height
as a full circle. From this graph we could determine the relationship between
optimal angle and height, which we used to verify our predictions. (B) The
relationship between optimal angle and height is shown as a solid line on top
of a scatterplot showing the observed arm angles at touchdown against the
height of the jump. Regression equation, angle= -77xheight+142.5; units
for v2, m2 s-2.
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