Medics claim going starkers between the sheets keeps you cooler, meaning sleep is less likely to be disturbed.
They say waking at night produces more of the hormone cortisol, leading to increased appetite and possible overeating at breakfast.
Male fertility improves as a cooler, uninterrupted sleep results in steadier testosterone production
It comes after a poll of 1,000 people found only 25 per cent of Brits sleep in the buff.
Health expert Dr Sarah Brewer said: “Sleeping naked means that your body remains cooler during the night, which is important as overheating is a common cause of disturbed sleep.
“Being over-hot in bed by 3-4 degrees changes brain-wave patterns, reduces the amount of time you spend in REM sleep, increases the chances of waking up and reduces deep sleep.
“Many worry about sleeping naked in the winter, however if your bedroom is the recommended temperature of between 18-24 degrees all year round, then there shouldn’t be a problem.”