Why is it that even a little bit of exercise can reduce mortality?

The major guidelines for lifestyle disease prevention generally recommend 150 minutes or more of exercise per week, but this seemingly modest amount of exercise can be very difficult to achieve for people who have not exercised at all in the past or for older people. Recently, two research articles in the BMJ reported that even a little bit of exercise can reduce mortality in people, which is very similar to what was previously reported in the JACC (one of the most prestigious cardiovascular journals in the United States). According to the data, the percentage of people who remained very stable in the nearly 20 years between 1996 and 2014 across the United States who did not exercise was 25%, while the percentage of people who were active rose from 22% to 51.6%, which may also be the reason for the inflection point in the decline of cardiovascular disease in the United States. A large body of research suggests that a sedentary, inactive lifestyle can lead to a significantly increased risk of cardiovascular disease, tumors, and diabetes. In both reports, one article followed 7,000 people, and the follow-up study found that the average sedentary person from 20 to 79 years of age spent more than seven hours a day, and only young adults between the ages of 20 and 29 were able to achieve 150 minutes of exercise per week, suggesting that as people age, it becomes more difficult to move. The article synthesized seven large observational studies and found that even a little exercise can reduce mortality by 14% to 37% in the population compared to those who do not exercise. In another Norwegian study, which looked at more than 56,000 people, it found that exercise once a week reduced cardiovascular deaths by 29 percent in men and even more significantly in women, to 44 percent. Taken together, small amounts of exercise are easier to promote, such as getting up and moving around for 2 minutes every hour of sitting, walking while answering the phone, or walking briskly for 5 minutes in the morning and 5 minutes in the afternoon, these seemingly small exercises can bring huge benefits over time. Of course, if you can reach the guideline recommended 150 minutes of exercise a week is better. If you can’t, you still have to move. Conclusion: As long as you move, regardless of the amount of exercise, will also bring health benefits.