1. In summer, you can run in the house by yourself, lift your legs in place, squat and jump.

2. Hula hoop, sit-ups and push-ups.

3. Expand your chest, punch, take a deep breath, talk more, and laugh (not giggle).

When the weather is cool in the morning and evening, you can go out for a walk, jump rope, jog, play ball, ride a bike and swim. Jog for 30 to 50 minutes. Cycling 1 hour ~ 75 minutes. Walk 1 hour ~ 1.5 hours. Swim for 30 to 40 minutes. Play tennis for 45 minutes ~ 1 hour. Jump rope for 30 ~ 40 minutes.

5. Walk in a straight line at ordinary times and enlarge the steps appropriately, so the speed can be accelerated. Sit up straight when sitting.