DUMBBELL CHEST PRESS
It's important to note that on most chest exercises, to target the pecs fully, you must press the tailbone into the bench and squeeze the shoulder blades together before starting the pressing movement. If you do not have shoulder issues, you can go past 90 degrees with the elbows to get a deeper stretch and lengthier contraction of the muscle.
* Squeeze shoulder blades together
* Tuck tailbone
* Keep the weight over the chest, not over the face