1. Be physically active
From the age of 30, our body loses a small percentage of its muscle mass each year; this phenomenon increases considerably in our fifties. It is therefore essential to do weight training activities, especially to maintain adequate muscle mass. This has a direct effect on metabolic efficiency and on remaining at a healthy weight, in addition to helping maintain good balance as we age. Cardiovascular activities (jogging, swimming, cycling, etc.) help maintain the cardiovascular system, and thus aid in preventing diseases that can affect it.
The general rule to follow: you should do 150 minutes of moderate-to-high intensity physical activity every week. This is equivalent to 5 periods of 30 minutes each. Of course, you can divide this total activity time in any way that suits your schedule.