
The dumbbell fly isolates the pectoral muscles.
Lying on a flat bench, hold a dumbbell in each hand above your chest, palms facing each other, elbows slightly bent.
Open your arms out to the sides in an arc until you feel a stretch in the pectorals, then bring them back together above your chest.
Keep the same elbow bend the whole time and do not lower the dumbbells below bench level.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry