Long term practice of dumbbells can modify muscle lines and increase muscle endurance. Regular dumbbell exercises with excessive weight can strengthen muscles, strengthen muscle fibers and increase muscle strength. Can exercise upper limb muscle and waist, abdominal muscle.

For example, when doing sit ups, hold dumbbells at the back of the neck with both hands, which can increase the load of abdominal muscle exercise; holding dumbbells to do body bending or turning movement can exercise the internal and external oblique muscles of abdomen; the straight arm forward lift and side horizontal lift of holding dumbbells can exercise shoulder and chest muscles. Can exercise lower limb muscle. Such as holding dumbbells, squatting with both feet, etc.

Source: @xrobxtattoox