It all depends on your diet buddy
There are many lifestyle choices one can make to improve one's healthiness.
Most common here include eating healthier (including a varied amount of vegetables as well as fruits, nuts, seeds, lean meat, good fats, and other important sources of macro and micronutrients) performing more physical activity (here we can include going to the gym, cycling, running, etc), doing more cognitive activities, perhaps meditating, as well as socializing more.
1. Indoor Swimming. Many gyms offer pools that are closed off.
2. Indoor Cycling. There are many places such as SoulCycle and Cyclebar.
3. Threadmill. You may have one at home. Adjusting speed and length you run will make for a more intense workout.
You should speak with a local pharmacist, or your doctor. Hope this helps!