摘要
Do you spend many hours of the day sitting?When you sit,you use less energy than you do when you are active.Sitting too much hurts your back,and it's bad for your heart.It causes you to gain weight and may even increase your risk of cancer.How can you avoid sitting too much?Every 30 minutes,move and stretch.Better yet,take a short walk.Stand when you talk on the phone or watch TV.If you work at a desk,try using a standing desk or work at a high table orcounter.
