The dumbbell can exercise upper limb muscles, waist and abdominal muscles. If you hold the dumbbell tightly at the back of your neck when doing sit ups, you can increase the load of abdominal muscle exercise; Holding dumbbells to do lateral flexion or rotation can exercise the internal and external oblique muscles of the abdomen; Straight arm front lift and side flat lift holding dumbbells can exercise shoulder and chest muscles.
The dumbbell can exercise lower limb muscles. Such as holding dumbbells, squatting on one foot, squatting and jumping on both feet, etc.