1, long-term practice of dumbbells, muscle lines can be modified to increase muscle endurance, weight exercises often do heavy dumbbells, you can make muscle
Strong meat, strong muscle fibers, increase muscle strength.
2, you can exercise upper limb muscles and waist, abdominal muscles. Such as doing sit-ups in the back of the neck with both hands grip dumbbells, abdominal exercises can increase the load; hand-held dumbbells do lateral flexor or swivel movement, you can exercise abdominal, external oblique muscle; hold the dumbbell straight Arm lift, side level, etc. can exercise shoulder and chest muscles.
3, can exercise lower extremity muscles. Such as hand-held dumbbell squat legs, legs and other squat jump.