Why Core Flexion is crucial for speed 1. Powerful hip drive. Flexion strength helps stabilize the pelvis so the hip flexors can pull the thigh forward quickly during the swing phase of a sprint. Faster leg recovery = higher stride frequency. 2. Efficient force transfer. A strong flexion-capable core keeps the torso from extending or “arching” under high forces, which allows power from the legs to transfer directly into forward motion instead of leaking through excessive spinal movement. 3. Bette

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