Dumbell exercises are popular with gym users through elite athletes. They can be used exclusively to form a wide variety of strength training programs, or they can be used to compliment a program that uses resistance machines, barbells or resistance bands for example.
Dumbells are often favored over weights machines and when performed correctly they are equally as safe. Dumbell exercises incorporate stabilizing muscles helping to develop a balanced posture and perhaps reducing the risk of over-use injuries. They also allow you to work through a potentially greater range of movement than resistance machines.