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A look at the muscles at work during arm flexion and extension. Flexion activates the biceps brachii, brachialis, brachioradialis, extensor carpi radialis longus, and extensor carpi radialis brevis, while extension engages the triceps brachii and anconeus.

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Anatomy Standard

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HIP MOBILITY - A BIG MISS with hip mobility and strengthening the hips is doing so with the most tension being while we are in hip flexion. Make sure to load those hip flexors in a lengthened position. Think of it as stretching under load. Strength at Length is key with mobility!

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