Sleep 'helps dieters lose weight'
Dieters can improve their chances of losing weight by ensuring they get a good night's sleep, according to new research.
An adequate night's sleep not only increases fat loss for a dieter but can help control feelings of hunger, a study has shown.
The University of Chicago research, published in the Annals of Internal Medicine, studied ten people aged 35 to 49 years old ranging from overweight to obese who were placed on a calorie-restricted diet.
The volunteers underwent a fortnight where they spent eight and a half hours in bed a night getting an average of seven hours and twenty five minutes of sleep. They also under went a fortnight where they were given five and a half hours in bed, with an average of five hours and 14 minutes sleep a night.
The study found that the dieters lost the same amount, 6.6lb, or around 3kg, during each 14-day session, if they had a full night's sleep or less.
But when they got adequate sleep, more than half of the weight they lost was fat compared with only a quarter when they cut back on sleep.
Getting adequate sleep also helped control the dieters' hunger, the study showed.
Average levels of ghrelin, a hormone that triggers hunger and reduces energy expenditure, did not change when dieters spent eight and a half hours in bed. When they spent five and a half hours in bed, ghrelin levels in the dieters rose over the two weeks.
The volunteers followed a balanced diet with calories restricted to 90% of what each person needed to maintain his or her weight without exercise. The number of calories they consumed over both fortnights, about 1,450 per day, was kept the same.
The volunteers spent their waking hours engaged in home or office-like work or leisure activities.