Many of your favorite outdoor activities can be done indoors once the weather gets cold. This list is by no means exhaustive. Many other outdoor activities lend themselves to being done indoors.
Runners can use a treadmill
Cyclists can ride a Peloton
Swimmers can find an indoor pool
Climbers can go to a climbing gym
Tennis players can find indoor courts
Basketball players can shift their park pickup game to an indoor court
Anyone can do pushups, situps, squats, burpees or stretches inside your home or office
