#5. Dumbbell Flye
Dumbbell flyes isolate the pecs without also taxing the triceps, flyes allows for a much greater stretch of the pec fibers than any press, and studies prove that when a muscle is stretched under tension, several anabolic (growth-producing) pathways are vigorously stimulated.
Tips: Move the dumbbells slowly in a relatively wide arc until you feel a deep stretch in the pecs from armpit to sternum. Try holding the stretch for 2-3 seconds on some of your reps. Experiment by performing this exercise from various angles – all the way from a slight decline to as high as a 60-degree incline.