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Negatives, when used properly in a
training program, can be a good thing! When a muscle shortens during an
exercise, it is called the concentric, or positive phase of contraction; when it lengthens, it is called the eccentric or negative phase. Research shows that the muscle can be up to 40% stronger in this negative phase. Capitalize on this fact for a more effective workout. For example, raise the lower arm in a biceps curl on a count of 1-2-3. Then, lower the weight in a slower movement, 1-2-3-4-5.
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