Japan gov't study warns smartphones keep children sitting too long

The Japanese government's health ministry has issued a study warning that excessive smartphone and device usage is contributing to increased sedentary behavior among children. Long periods of screen time can negatively impact children's physical fitness and mental health, potentially leading to low mood, according to the research team. The ministry advises parents and children to establish rules limiting screen time to no more than two hours per day.

To combat prolonged sitting, the study recommends children not remain seated during school or cram school breaks and to stand while engaging in activities such as reading aloud or memorizing English words. It emphasizes the importance of regular breaks from sitting for both children and adults. These breaks can include standing up, stretching, or moving feet up and down even while seated. Another option is to introduce height-adjustable desks.

For older individuals, extended periods of sitting are associated with an increased risk of dementia and declines in physical function. The research team suggests that older people can mitigate this risk by taking frequent breaks from sitting, engaging in housework and other activities, and prioritizing time to go out and be active.