Sometimes you seem to sleep eight hours and still wake up wrecked with low recovery. The answer often hides in the kitchen — in what and when you ate in the evening. Food and drink affect sleep more than you would think, and tri helps you spot the link.

Caffeine lingers longer than you think

A cup of coffee perks you up for a couple of hours but clears far more slowly: half of it is still in your blood six to eight hours later. Coffee at three in the afternoon is still partly working at night — quietly stealing deep sleep. You fall asleep fine but sleep more shallowly, and in the morning it shows in your recovery.

Caffeine hides in more than coffee: tea, cola, energy drinks, dark chocolate. If your sleep is broken, try moving all caffeine to the first half of the day and note it in the journal. Compare a week later.

A late heavy dinner gets in the way of recovery

When you lie down on a full stomach, the body is busy digesting instead of resting. Heart rate is higher at night, there is less deep sleep, HRV is lower — especially after heavy, fatty and spicy food right before bed.

You do not have to go hungry: eating your main meal two or three hours before bed is enough, with something light later if you want it.

Alcohol puts you to sleep but does not restore you

A glass in the evening helps you drop off, and that seems like a plus. But alcohol breaks the second half of the night: REM sleep all but disappears, resting heart rate rises, HRV falls. In the morning recovery sags even if you slept long enough by the clock. The band will show it honestly.

What to do

  • Caffeine before lunch.
  • A heavy dinner, but not right up against bedtime.
  • Less alcohol in the evening — and log it, so you can see your own reaction.

Log food and drink for at least a couple of weeks and tri will show which of them wrecks your sleep.

Sources

  • Late eating is linked to a higher body fat percentage — McHill A. et al., Am. J. Clin. Nutr., 2017. read
  • A late dinner worsens night-time glucose metabolism and fat burning — Gu C. et al., J. Clin. Endocrinol. Metab., 2020. read

This is general information, not a medical recommendation on nutrition. With any particular condition, consult a doctor.