Just like a regular flat bench, this exercise primarily targets your chest. However, this exercise targets the lower sternal pectoral (lower chest) muscles. You're typically able to lift more with decline bench than you are flat bench.
1) Position yourself on a bench that has a decline. Lie down while holding a dumbbell in each hand, resting on top of your thighs.
2) Move the dumbbells in front of you with palms facing away from you.
3) Push the dumbbells up using your pectoral muscles. Squeeze. Then lower the weight slowly back to the starting position.
If you have any additional tips for this exercise, please let me know in the comments below and I will add them to this card. :)