Many people attend physical exercise every day. For the first time in recent 10 years, the United States government has changed its guidance (指导) on how much exercise people need to stay healthy and when they should start.
The new guidance says that children as young as 3 years old need to exercise. Earlier guidance used to begin at the age of 6. Dr. Girior says that the most important time for children to begin exercising is between 3 and 5. He notes that boys and girls in this age group need at least three hours of activities every day.
Doctors say it is important to begin at a young age. They add that from the birth to the age of 5, a child's brain develops more than at any other time in life. These developments have a lasting effect on a child's ability to learn and to succeed in study and in life. As for children between 6 and 17, at least one hour a day,
For adults, the suggested time for exercise remains the same 150 minutes per week. However, those people who are over the age of 65 should include activities that help their balance. Better balance means fewer falls and less chances of injury.
Many people are excited and satisfied with this guidance. But some find that it has changed nothing about the dangers of sitting too much. Because there are still lots of people who sit too much every day. It is harmful and can even undo (破坏) the benefits of exercise you may have gotten. Because of that, let's sit less and start young.
