What's the name of the ball in the old man's hand?

1, the ball turned by the old man is called fitness ball, which can exercise the muscles of chest, abdomen, back, buttocks and legs, and these muscles play an important role in maintaining body balance, improving body posture and preventing sports injuries.

2. Fitness is a kind of exercise, such as all kinds of unarmed aerobics, rhythmic gymnastics, rhythmic gymnastics, and all kinds of self-resistance movements. Gymnastics can enhance strength and flexibility, increase endurance, and improve the ability to coordinate and control all parts of the body, thus making the body strong. If you want to relieve stress, exercise at least three times a week.

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