Sleep
What 7+ hours actually does to your body and brain.
Why it matters
Memory consolidation
Slow-wave sleep is when the day's learning moves from short-term to long-term storage.
Recovery + growth hormone
The largest GH pulse of the day fires during deep sleep. Skip it and you blunt repair.
Mood and stress regulation
Studies show consistent 7+ hr sleep reduces self-reported anxiety and depressive symptoms.
The longer story
Sleep is not idle time. It's when your body runs the maintenance jobs it can't run while you're awake: glymphatic flushing of metabolic waste from the brain, growth hormone release, immune-cell trafficking, hormonal resets across cortisol, leptin, and testosterone.
The 7-9 hour range isn't arbitrary. It's the window where most people complete 4-5 full sleep cycles, which is what you need to get adequate amounts of both deep (slow-wave) and REM stages. Skipping either has measurable cognitive and metabolic costs the next day.
If you're chasing recovery, peptide gains, body recomposition, or focus, sleep is the single biggest variable you can move. It's free, it's repeatable, and the research is the strongest of any wellness intervention.
Sources
- · Walker, M. (2017). Why We Sleep.
- · Van Cauter et al. (2008). Metabolic consequences of sleep restriction.
- · Irwin, M. (2019). Sleep and inflammation.
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🏋Training Frequency