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How does resistance training build muscle?

The body responds to the demands placed upon it. When resistance training the muscle is being asked to do something it is not accustomed to performing. Therefore the muscle must adapt. The first adaptations that take place are neurological. Neurological adaptations which occur are increased motor unit recruitment and increasing motor unit frequency. In the muscle, cellular adaptations occur, which allow the muscle to produce more energy and subsequently more force.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.