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Mr. Sun is 65 years old this year. He has loved sports since he was young. After retirement, he has more time and has increased his exercise. He often walks tens of thousands of steps with the walking group in the community.

After persisting for several years, Grandpa Sun found that there was something wrong with his knee joints. Now, let alone running, his knees would hurt if he walked a few steps. He went to the hospital for a check-up. The doctor said that his knees were worn out due to excessive exercise. He should not exercise like this anymore and should focus on rest.

This situation was a little hard for Grandpa Sun to accept. How could he have problems with exercise? Was his belief that life lies in exercise wrong?

1. Does life lie in movement or in rest?

New England Journal of Medicine (BMJ)A study published in the Journal of the American Medical Association followed up 8 studies involving 36,383 subjects with an average age of 62.6 for 5.8 years. The results showed that 6.25 hours of light exercise such as walking and cooking or 24 minutes of moderate to high light exercise per day was associated with a 50-60% reduction in the risk of premature death.

Even light exercise, such as cooking and washing dishes, for just one hour a day was associated with a 40% lower risk of death, but those who sat for long periods of time, such as 9.5 hours a day, were associated with a two-fold increased risk of death from all causes.

In fact, there are quite a few studies showing that exercise can help improve physical health.

A study published in a JAMA journal also pointed out that appropriate exercise such as walking, jogging, and playing ball can reduce the risk of death for the elderly.