If you are not getting outside much, you may be working out but missing a lot of the benefits of fresh air and sunshine.
Vitamin D is super important to your health, and the best way to get sufficinet amounts is from sunshine.
Get out and walk, jog if you like, or simply do some stretching and movement while in the out of doors. Try this with bare feet to ground yourself to the earth.
Tai Chi is a wonderful way to loosen up and stay younger, best of all it can be done outside.
Maybe you can find a group to join.