Chapter 15 — Fitness & 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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