Lie down on your back on a bench and hold 2 dumbbells at chest level along your body, palms facing your feet. raise the dumbbells straight up until your elbows are close to being locked and lower them back slowly after a short pause.. In this episode i want to show you a killer home chest workout you can do at home in just a few minutes. it's a great way to build a muscular chest -- and all you'll need is a couple of dumbbells. So while an incline dumbbell press will work the whole chest, it’s making the fibers that attach to your clavicle work harder than the ones that attach to your ribs. we’ve given you exercises that work every part of the chest and with varying degrees of isolation..