Sleep and Men's Health: The Largest Single Lever

What short sleep does

Sleep restriction studies in healthy young men have found measurable reductions in daytime testosterone after roughly a week of restricted sleep. That is a larger effect than any over-the-counter supplement has demonstrated.

Short sleep also degrades insulin sensitivity, shifts appetite hormones toward greater hunger, impairs reaction time and reduces training performance the following day.

The apnoea problem

Obstructive sleep apnoea is common in men over 40 and frequently undiagnosed. It fragments sleep hundreds of times a night without fully waking you, producing exactly the unrefreshing-sleep-and-daytime-fatigue picture that gets blamed on age or stress.

Warning signs: loud snoring, witnessed breathing pauses, waking with a dry mouth or headache, daytime sleepiness despite adequate time in bed. The Sleep Foundation covers what testing involves.

The habits with the largest return

1. Consistent wake time, including weekends. Anchors everything else.
2. Morning light within thirty minutes of waking.
3. Caffeine cut-off by early afternoon — the half-life is five to six hours.
4. Cool, dark room. A core temperature drop is part of sleep onset.
5. Alcohol honesty. It shortens onset and degrades the second half of the night.

Why weekend catch-up does not fix it

Sleeping ten hours on Saturday does not cancel five weeknights at six. Some recovery occurs; the metabolic and cognitive effects of chronic restriction do not fully reverse.

The order of operations

If you are choosing one thing to fix this month, fix sleep. Every other intervention on this site works better afterwards, including anything in a bottle.

Keep reading

• Resistance Training After 40: The Minimum That Works
• Protein Intake for Men: How Much and When
• Stress, Cortisol and Men's Energy
• A Morning Routine Built for Steady Energy
• How to Run a Supplement Trial on Yourself

Found this useful? The rest of the series is on the Horsewood blog.