1. Running: You only need a pair of suitable shoes to run outdoors or indoors.

2. Push-ups and sit-ups: These basic physical training do not need any equipment, only their own weight.

3. Skipping rope: Skipping rope is a simple and effective aerobic exercise, which can be carried out with only one skipping rope.

4. Yoga and Pilates: These exercises can be learned through online videos or books, and only need a soft support, such as a yoga mat or carpet.

5. Dynamic stretching: Taking out 20 minutes for dynamic stretching every day helps to relieve the stress and tension of the body and enhance flexibility.

No matter which way you choose, you should ensure proper rest, diet and water, as well as correct techniques and postures to avoid injury.