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Infographic titled '5 Keys to Sprinting Fast' with numbered tips and simple icons: 1) Ground Reaction Forces — foot pushing the ground and a small bar chart, 2) Stride Mechanics — diagram balancing stride length and rate with beginner vs elite lines and a running silhouette, 3) Angular Velocity — 'whip from the hip' thigh swing illustrated with a spring, and 4) Leg Stiffness & Elastic Energy — reduced ground contact foot, spring graphic and a circular diagram linking posture, rhythm, foot strike and arms.

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