Your bedroom is a machine for sleeping. Tune three dials — light, heat, noise — and the machine mostly runs itself.
Light: dark means dark
Even dim light during sleep measurably raises heart rate and next-morning insulin resistance. Blackout curtains for the windows, electrical tape for the router LED, a mask for everything else.
Temperature: 65–68 °F
Core temperature must drop for sleep onset. Cool room, warm feet is the classic recipe: socks move blood to the skin, dumping heat faster. Warm sleepers should look at percale sheets and gel-layer pillows before gadgets.
Sound: mask, don't fight
It's not the volume that wakes you — it's the change in volume. Steady broadband noise flattens those spikes. A white-noise machine at under 50 dB, or earplugs if your disruptor shares the bed.
This article is for information only and is not medical advice. If insomnia lasts longer than three weeks, see a doctor.
