The next warm(ish) day, grab your lunch and lawn chair and head outdoors. Back yard picnics are great for putting a spring (ha ha) back in your step. Even a sandwich on the front porch steps can provide a change of scene. If you're feeling adventurous, head for a park where you can have plenty of distance from others.
Try some yogaIf you decide to try yoga, please be very careful! Not all yoga is for everyone, and these links have not been vetted by experts. They are labeled "for seniors," but use your own judgment. The first one might be a place to start if you have limited mobility or balance: chair yoga.
https://www.youtube.com/watch?v=-Ts01MC2mIo
https://yogawithadriene.com/yoga-for-seniors-slow-and-gentle-yoga/
https://www.youtube.com/watch?v=NDLad2vOHkU