Washington: Teenagers have been urged to play sports or run for at least three hours a week to counteract the potential damage to their bone health caused by prolonged spells of sitting.An international team, including an expert from the University of Exeter, has found evidence that adolescents who spend longperiods engaged in certain sedentary activities are more likely to have low bone mineral content in parts of the body where it canbe an indicator of the risk of developing osteoporosis.In the research, the team found that studying put girls at particular risk, while for boys leisure internet use posed the greatestthreat.Scientists found that participating in at least three hours of certain sports could significantly reduce the threat in girls. The studyfound evidence of the benefits of high-intensity sports where the participant is on their feet, such as football, basketball, netballor running.
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