2. The purpose of exercise is to increase muscle. It is best to choose dumbbells with 65% - 85% load(dumbbell）. For example, if the load that can be lifted each time is 10kg, you should choose dumbbells with a weight of 6.5kg-8.5kg for exercise. Practice in 5-8 groups every day, 6-12 times in each group. The action speed should not be too fast, with an interval of 2-3 minutes in each group. If the load is too large or too small, and the intermittent time is too long or too short, the effect will be bad.
3. The purpose of exercise is to reduce fat（dumbbell）. It is suggested that 15-25 times or more should be done in each group, and the interval between each group should be controlled within 1-2 minutes. If you find this kind of exercise very boring, you can practice with your favorite music, or follow the music to do dumbbell aerobics.