General recommendations are for 30 minutes a day, or 150 minutes a week, of moderately intense activity most days of the week.But the debate rages on over a magic formula for sustaining weight loss.

• 通行的推举量是天天30分钟，或许每周150分钟中等强度的运动，但是关于坚持体重减轻所需的运动的争论仍然没有定论。