When combined with ample overload, push-ups are one of the most effective and safe functional mass builders. We can easily apply eccentric overload (lowering a heavier weight than you can lift) to further enhance this training stimulus.

The total weight on the eccentric phase (bodyweight included) is just over 500 pounds while the concentric (lifting) phase is slightly over 400 pounds.
Simply have a partner place a dumbbell, kettlebell, or sandbag on your back during the negative phase of the push-up and then immediately have them lift the weight off to allow a powerful completion of the concentric phase.
Applying this concept to push-ups not only crushes the chest, shoulders, and triceps, but also the core and spinal stabilizers because you're essentially holding an incredibly heavy plank.
THE ECCENTRIC POTENTIATION PUSH-UP
In the video, NFL Combine athlete Michael Montero performs an eccentric potentiation weighted push-up protocol using the ledge push-up technique.
The total weight on the eccentric phase (bodyweight included) is just over 500 pounds while the concentric (lifting) phase is slightly over 400 pounds.
Simply have a partner place a dumbbell, kettlebell, or sandbag on your back during the negative phase of the push-up and then immediately have them lift the weight off to allow a powerful completion of the concentric phase.
Applying this concept to push-ups not only crushes the chest, shoulders, and triceps, but also the core and spinal stabilizers because you're essentially holding an incredibly heavy plank.