Health Check Podcast

Boys with nine hours of sleep are less likely to grow fat

Boys who slept nine hours or more every night had a lower obesity risk and less dangerous fat.

ST GRAPHIC: CHEN JUNYI

Joyce Teo

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Synopsis: Every first Wednesday of the month, The Straits Times helps you make sense of health matters that affect you.

A recent A*Star study found that boys who slept at least nine hours every night had a 51 per cent lower obesity risk and less abdominal fat.

Abdominal fat, particularly fat around internal organs, is more strongly linked to metabolic diseases such as type 2 diabetes and cardiovascular disease than overall body weight.

Published in the journal Obesity (Oct 2025), the study used MRI imaging to examine how sleep habits relate to fat distribution in 10-year-olds in Singapore.

In this episode, ST senior health correspondent Joyce Teo talks to the study’s authors Dr Cai Shirong and Dr Navin Michael about the importance of sleep and how sleep deprivation can increase the risk of obesity and overweight in children.

Dr Cai And Dr Navin are principal scientists from the A*STAR Institute for Human Development and Potential.

Highlights (click/tap above):

4:48 Does catching up on sleep during the weekend reduce the risk of obesity?

7:07 Why was there a weaker association between sleep deprivation and obesity in girls?

8:00 Prevalence of obesity in children and adolescents

15:45 Why do we prefer burgers over salad when we are sleep deprived?

17:38 Sleep can help regulate cognition in children

19:43 Examples of caffeinated beverages consumed by children

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