[Dumbbells expand chest muscle width]
Dumbbell exercises require more balance and coordination to control the weight than barbell exercises,
It has a large range of motion, so it can fully stretch the muscles and develop a broad mind.
There are two common training movements, flat dumbbell bench press and flat dumbbell fly.
Note that during the push-up process, make sure to push the dumbbell vertically and not slanted.
You can practice in front of the mirror, correct your movements, and appreciate your exercise results.