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Recovery

Sleep Hygiene for Athletes: Optimizing HGH Release

RepLog Team
January 17, 2026
5 min read
Person sleeping deeply with sleep mask

The Growth Hormone Wave

You do not grow in the gym.You break muscle tissue down in the gym.You grow in bed.

The majority of Human Growth Hormone(HGH) — the potent anabolic hormone responsible for cell repair and muscle growth — occurs during Slow Wave Sleep(SWS) , also known as Deep Sleep.

This typically happens in the first 3 - 4 hours of the night.If you stay up late scrolling TikTok and cut your sleep to 5 hours, you are literally skipping your body's steroid cycle.

The Testosterone cost:

A study from the University of Chicago found that men who slept 5 hours a night for just * one week * had the testosterone levels of someone 10 - 15 years older .

Sleep deprivation is chemical castration.

The "Sleep Hygiene" Checklist

  1. Temperature is King: Your core body temperature must drop by about 2 - 3 degrees Fahrenheit to initiate sleep.Set your thermostat to 65 - 68°F(18 - 20°C).If you wake up sweating, you aren't recovering.
  2. Darkness: Even a small LED from a TV standby light can suppress melatonin production.Get blackout curtains or a high - quality sleep mask.Total darkness signals the brain to shut down.
  3. The Caffeine Halflife: Caffeine has a half - life of ~6 hours.If you drink a double espresso(200mg) at 4 PM, you still have 100mg in your blood at 10 PM.That is enough to block Deep Sleep.Cut caffeine by noon.
  4. The Blue Light Filter: Blue light(from phones / laptops) mimics the sun.It tells your brain "It's morning, wake up!" Install "f.lux" on your computer and use "Night Shift" on your phone.Better yet, no screens 1 hour before bed.

Supplements That Actually Help

Most "Sleep Boosters" are garbage.However, two minerals are essential for athletes:

  • Magnesium Glycinate: Helps relax muscles and the nervous system.
  • Zinc: Supports testosterone production during sleep.

(Combined, these are often sold as ZMA).

Tracking

Use RepLog to note your sleep quality.You will likely see a 1: 1 correlation between "Bad Sleep" and "Missed Lifts." If your bench press is stalled, look at your sleep log before you look at your program.

The Power Nap

If you miss sleep at night, a 20 - minute nap at 2 PM can help restore alertness.

The Navy SEAL Rule: Drink a coffee immediately before you nap.Sleep for 20 minutes.The caffeine takes 20 minutes to kick in.You wake up right as the caffeine hits, avoiding the groggy "sleep inertia."

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