Chapter 15Fitness & Exercise

Do I really need rest days?

Yes. Muscles rebuild between workouts; skipping rest means declining performance and injury risk. Beginners: at least 2 rest days per week. Active recovery (walk, mobility) counts.

Follow-up questions

How long between muscle groups?

48 hours for the same muscle. Push/pull/legs splits let you train 6 days if you want.

Sore is good?

Sore = novel or heavy stimulus. Not a reliable measure of progress. Chronic soreness = overtraining.

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