What lifestyle habits most affect sleep quality?

Your AlterMe ring tracks the outcome of your sleep — but what happens during your day has as much influence on that data as what happens at night.

Regular exercise is one of the most effective tools for improving sleep quality. It deepens sleep, reduces Wind Down time, and improves HRV. Timing matters though — aim to finish intense training at least 2–3 hours before bed to allow your heart rate and body temperature to settle before sleep.

Alcohol is one of the most common disruptors of sleep quality. Even moderate amounts suppress REM sleep, fragment the second half of the night, and elevate heart rate — all of which show up in your data. See our full article: How does alcohol affect my sleep tracking and score?

Caffeine has a half-life of 5–7 hours, meaning half of what you consume at 3pm is still active at 9pm. It delays sleep onset, reduces deep sleep, and increases nighttime awakenings. Most people sleep better when caffeine is cut off by early afternoon.

Elevated cortisol at night is one of the clearest predictors of fragmented, low-quality sleep. It increases Wind Down time, reduces deep sleep, and shows up as elevated awake periods. See our full article: How does stress affect my sleep data?

Your body needs to drop in temperature to initiate and maintain deep sleep. A cool, dark, quiet room — around 65–68°F (18–20°C) — creates the conditions your biology is looking for. Light and noise are underrated disruptors, even when they don't fully wake you.

Going to bed and waking up at the same time every day — including weekends — is one of the highest-leverage sleep habits. Irregular sleep timing fragments your circadian rhythm, reduces deep and REM sleep, and makes Wind Down harder night after night.

The hour before bed is where sleep quality is often won or lost. Instead of screens, try AlterMe's recovery content — breathwork sessions, sleep and destress meditations designed to be done in bed, and restorative yoga sessions. Each is designed to bring your nervous system down and prepare your body for deeper, more restorative sleep.

Your DNA Plus report includes a caffeine metabolism profile, showing whether you're a fast or slow metabolizer based on your CYP1A2 gene variant. Slow metabolizers are significantly more sensitive to caffeine's sleep-disrupting effects — your cutoff time may need to be earlier than the general guideline. Check your DNA report for your personal result.