What Actually Causes Muscle Growth?

What you’ll learn

Muscle grows in response to a specific kind of stress, tension placed on the muscle, followed by enough recovery to adapt to it. Everything else you've heard about muscle growth is really just detail on top of that one mechanism.

Key takeaways

Muscle adapts to tension, lifting something that genuinely challenges it.
Growth happens during recovery, not during the set itself.
You don't need to chase soreness, it's not a reliable sign of a good session.
Consistency over months matters far more than any single workout.

Your action

In your next session, pick one exercise and focus on feeling the target muscle working, rather than just moving the weight from A to B.

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