Which is better for your muscles, dumbbells or machines? The American
College of Sports Medicine and many strength experts recommend using a
combination of the two. Together, they help to increase strength,
while also improving coordination and flexibility. For example, using
a chest-press machine may allow you to lift more weight safely, but
using dumbbells to push into a press requires muscle balance and
coordination. Muscles benefit from both types of weight training. Mix
it up. Find a routine that fits you and your goals.