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From 2 episodes

Do muscles grow during the workout or during rest?

Answered by Nikkiey Stott and her guests · Updated

The short answer

Muscles grow during rest, not during the workout. Nikkiey explains that lifting creates tiny tears in your muscle fibers, which signal your body to repair and rebuild. That rebuilding, called muscle protein synthesis, happens in the hours afterward, fueled by enough food, sleep, hydration and recovery. The gym starts the process. Recovery finishes it.

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  1. Nikkiey on how lifting creates micro tears and rest rebuilds them stronger

    Plays from 4:55 · Ep. 88: Do Women Over 40 Need Rest Days to Build Muscle?

  2. Why muscle is built in the hours after training, with food, sleep and water

    Plays from 3:56 · Ep. 116: How to Build Muscle After 40: What Actually Works

  3. Why skipping recovery stalls growth and why no days off backfires

    Plays from 6:42 · Ep. 88: Do Women Over 40 Need Rest Days to Build Muscle?

  4. How slowing the lowering phase creates the damage that triggers growth

    Plays from 1:53 · Ep. 116: How to Build Muscle After 40: What Actually Works

The full answer

On Ep. 88, Nikkiey explains that resistance training (barbells, dumbbells, anything that puts your muscles under load) creates tiny micro tears in your muscle fibers. Those tears aren't harmful. They're the signal your body needs to go into repair-and-rebuild mode, and the muscle comes back stronger. But that only happens if you give your body the right environment: the right food, enough rest, hydration and limited stress. Without those, she says, your body won't build more muscle. And since toned is just muscle showing as you lose body fat, you can't get toned without it.

That's why she pushes back hard on the no-days-off mentality. Training every day without enough recovery skips the part where the results actually happen, and she warns it can lead toward overtraining syndrome and persistent fatigue. If you've been grinding daily and not seeing change, the plan is working against you. You aren't failing.

On Ep. 116, Nikkiey adds a few practical layers:

  • Fuel matters around the session too. If you lift first thing while fasting, she says you're training in a catabolic state, where your body breaks down muscle for energy. She recommends eating pre and post workout and throughout the day.
  • Consistency beats intensity. Steady, hour-long sessions spread over weeks leave room for recovery, adaptation and growth. Going all out for three hours at a time doesn't.
  • The workout still has to be a real stimulus. Slowing the lowering (negative) part of a lift increases time under tension, which she says can be more effective at creating the muscle damage that kicks off rebuilding.

So the gym and the rest days aren't competing. You challenge the muscle in your workout, then you build it in the hours and days after with food, sleep, water and real recovery.

From Nikkiey Stott and WarriorBabe's coaching. For education, not medical advice: talk to your doctor about your own health.

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