Long-term practice of dumbbells can modify muscle lines and increase muscle endurance. Regular practice of weight-bearing dumbbells can make muscles strong, strengthen muscle fibers and increase muscle strength.
Can exercise upper limb muscles and waist and abdomen muscles. For example, when doing sit-ups, putting dumbbells behind your neck with both hands can increase the load of abdominal exercises; Lifting dumbbells to do lateral bending or turning exercises can exercise the internal and external oblique muscles of the abdomen; Keep your arms straight forward and lift dumbbells sideways to exercise your shoulder and chest muscles.
Extended data:
Choose dumbbells with appropriate weight before training. Generally, you need to choose dumbbells with a load of 65%-85%. The so-called load refers to the maximum weight that can be lifted. For example, if the maximum weight that can be lifted at a time is 10 kg, you need to choose dumbbells with a weight of 6.5-8.5 kg for exercise.
For the average bodybuilder, there are two or three pairs of dumbbells with different weights, so it is enough to keep exercising. When exercising, lift 6-8 groups at a time, and each group repeats 8- 12 times. Don't move too fast, and each group is 2-3 minutes apart. The load is too large or too small, the intermittent time is too short or too long, and the effect is not good.
Baidu Encyclopedia-Dumbbells (Simple Equipment for Strengthening Muscle Strength Training)