Being fit is absolutely a good way to stay young and healthy. However becoming older, your cells turnover slows down, which means it takes the body longer to recover both after activity and a wound.
The skins elasticity decrees. You have to work harder with what you have. I still believe strongly in maintaining your HIIT training 3 times a week for a-proximity 30 min per session – during this time you should really sweat 😓. If you jog, do burpees or really intense Yoga, is all up to you. Just get that heart pumping. This will kickstart your growth hormone. The second thing I vote for is Yoga, all sorts – This will give you the flexibility you need.
Third, you need – me time. It will keep you sane and focused.
Fourth but not last – keep curious to new things, new music, new places , new people, trends. A lot of people get stuck in a old way of thinking.