1. Contract the biceps, moving the forearm out and up through a natural range of motion with your forearm in a supine position.
2. Isometrically contract the muscle at the end of the concentric contraction and hold for a second.
3. Return to the starting position with the elbows aligned under the shoulders and slightly bent.
4. Do not lock out the arms, as this will place more stress on your ligaments and tendons.
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