One: Beginners practice 6 to 8 groups of exercises a day. You can practice multiple movements, not too fast, and each group is separated by 2-3 minutes. The load is too large or too small, and the intermittent time is too long or too short, the effect will be bad.

Two: Dumbbell is a simple instrument to strengthen muscle strength training. Its main material is cast iron, and some are covered with rubber. Used for muscle strength training and muscle compound action training. Patients with low muscle strength due to sports paralysis, pain, long-term inactivity, etc. Holding dumbbells, you can use the weight of dumbbells to actively exercise against resistance and train muscle strength.