1. You can do some weight training at home, such as push-ups, belly rolls, squats and so on!
2. Skipping rope, running and swimming are all good outdoor sports!
3. Now many communities have free fitness equipment, all of which can be exercised!
To sum up: in fact, any venue can be used except the gym. In the office, you can do biceps brachii bending with a cup and triceps brachii bending with a stool. As long as you master the methods and scientific training movements, you can exercise anywhere! I hope the answer will help you.