Cluster
Sleep, recovery, fitness fundamentals
Sleep cycles, recovery mechanics, fitness fundamentals — NO medical advice, NO supplement claims.
Cornerstone questions
The anchoring questions that define this cluster's scope.
- how long does sleep cycle last
- what temperature for best sleep
- how long does muscle recovery take
- what ratio of protein to bodyweight
Sub-topics
All answers in this cluster
how long does…(3 answers)
- How long does muscle recovery take?
For healthy adults, muscle recovery typically takes 24 to 72 hours after training…
- How long does a sleep cycle last?
A full sleep cycle (NREM + REM) lasts ~90 minutes (range 80-110). Adults complete 4-6 cycles per night (6-9 hours total).
- How long does marathon training take?
First-time marathon training: 16-20 weeks from a base of running 3× per week. Returning runner (recent half-marathon): 12-16 weeks.
what is…(4 answers)
- What is progressive overload?
Progressive overload is the training principle of gradually increasing the demand placed on the body so it keeps adapting.
- What is REM sleep?
REM (Rapid Eye Movement) sleep is the sleep stage where most vivid dreaming occurs, the brain is highly active…
- What is the circadian rhythm?
The circadian rhythm is the body’s internal ~24-hour clock that regulates sleep, alertness, hormone release, body temperature…
- What is VO2 max?
VO2 max is the maximum rate at which your body can take in and use oxygen during intense exercise…
what ratio of…(1 answers)
- What ratio of protein to bodyweight do you need?
Protein needs are expressed in grams per kilogram of bodyweight per day.
Adjacent clusters
Related question families with overlapping audience or methodology.
- Cooking + food science
Timing, temperatures, ratios, and substitutions — the canonical AskedWell wedge.
- Habits + mindset
Habit formation, mental models, focus, and the science of personal change.
Every answer in this cluster cites real sources you can verify in one click. See methodology for how we choose + tier sources.