1. Skipping rope: Skipping rope is a simple and effective aerobic exercise, which can help you burn calories and improve heart and lung function. You can find an empty place at home, pick up the skipping rope and start jumping!

2. Running: If you have a treadmill or outdoor space, running is a good choice. It can not only help you burn calories, but also improve your cardiopulmonary function and endurance.

3. Dancing: Dancing is a very interesting aerobic exercise, which can help you burn calories and improve heart and lung function. You can find an empty place at home, play music and start dancing.

4. Cycling: Cycling is a very good aerobic exercise, which can help you burn calories and improve heart and lung function. If you don't have a bicycle, you can consider buying a folding bicycle.

5. Swimming: Swimming is a very good aerobic exercise, which can help you burn calories and improve your cardiopulmonary function and endurance. If you don't have a swimming pool or swimsuit, consider going swimming in the gym.