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Introduction to Sports Biomechanics: Analysing Human Movement ...

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

Figure 1.8 Same young female as in Figure 1.7 walking on a level treadmill at her preferred speed in trainers. Top left: right<br />

foot <strong>to</strong>uchdown (0 s); <strong>to</strong>p right: left foot <strong>to</strong>e-off (0.14 s); middle left: right foot mid-stance; middle right: left foot<br />

<strong>to</strong>uchdown (0.52 s); bot<strong>to</strong>m left: right foot <strong>to</strong>e-off (0.64 s); bot<strong>to</strong>m right: left foot mid-stance.<br />

halfway though the swing, when the knee extends again, before flexing slightly just<br />

before <strong>to</strong>uchdown. The ankle is roughly in a neutral position at <strong>to</strong>uchdown, as in the<br />

reference positions of Figure 1.2. The ankle then plantar flexes until the whole foot is<br />

on the ground, when dorsiflexion starts; this continues until the other leg <strong>to</strong>uches<br />

down. Plantar flexion then follows almost <strong>to</strong> <strong>to</strong>e-off, just before which the ankle<br />

dorsiflexes quickly <strong>to</strong> allow the foot <strong>to</strong> clear the ground as it swings forwards. As you<br />

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