Your body clock affects sleep, mood and mental health. Learn how daylight, sleep schedule, meal timing and exercise can help keep your circadian rhythm in sync.

Looking for the best sunrise alarm clocks in the UK? The Lumie Bodyclock Shine 300 is our pick for buyers who want a configurable sunrise, sunset and plenty of alarm sounds. The Philips SmartSleep HF3651/01 is the better choice if you want a more feature-rich bedside light with guided breathing, a night-time light and a 30-minute sunrise simulation. Both are worth considering if dark winter mornings make getting out of bed difficult.

Outside experts warn that more research is needed before "circadian depression" can be classified as a subtype

A new study suggests one in four people with severe, recurrent or persistent depression have a proposed subset called "circadian depression", where people often report waking up very tired and being a "night owl".

Bodyclock Glow 150 is an alarm clock that wakes you up with a personalised sunrise, feat. 10 sleep/wake sounds and fading sunset for better sleep. 45-day trial.

Gradual 30-minute sunrise wakes you naturally with light, so you feel properly refreshed and wide awake. Set the final light intensity as you like. Tap-control snooze.Unwind with a fading sunset and…

Wake with a gradual sunrise to feel naturally refreshed and wide awake. Choose 20, 30 or 45-minute sunrise and final light intensity. Include a wake sound for an audio alarm. Tap-control snoozeUnwind…

Gradual sunrise to wake you naturally, feeling refreshed and wide awake. Sunrise duration of 15-90 minutes and choice of final light intensity. Add the radio or a wake sound alarm. Tap-control…