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Introduction to Sports Biomechanics: Analysing Human Movement ...

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MOVEMENT PATTERNS – THE ESSENCE OF SPORTS BIOMECHANICS<br />

Figure 1.16 Older male running at his preferred speed in normal trainers. Top left: right foot <strong>to</strong>e-off (0 s); <strong>to</strong>p right: left<br />

foot <strong>to</strong>uchdown (0.12 s); middle left: left foot mid-stance; middle right: left foot <strong>to</strong>e-off (0.38 s); bot<strong>to</strong>m left: right foot<br />

<strong>to</strong>uchdown (0.50 s); bot<strong>to</strong>m right: right foot mid-stance.<br />

familiar with identifying these movements on video. The hip continues <strong>to</strong> extend early<br />

in the swing phase, roughly until maximum knee flexion, after which it flexes then<br />

begins <strong>to</strong> extend just before <strong>to</strong>uchdown; extension continues until <strong>to</strong>e-off. The knee<br />

is normally slightly flexed at <strong>to</strong>uchdown and this flexion continues, depending on<br />

running speed, <strong>to</strong> absorb shock, until the hip is roughly over the ankle. Knee extension<br />

then proceeds until <strong>to</strong>e-off, soon after which the knee flexes as the hip continues <strong>to</strong><br />

extend. The knee starts <strong>to</strong> extend while the hip is flexing and continues <strong>to</strong> extend<br />

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