pecs are nothing to play with in every gym theres always the guy trying to impress everyone on how much they bench but the only downfall is they lift it incorrectly by bouncing and jerking the weight to get it up thats where the pec is subseptible to injury keep in mind if you use proper form you will get stronger anyway
because you actually work the muscle throughout its entire range of motion,one time when my partner and i were competing against each other with 405 i felt a bad pull on the left upper pec which was a warning sign to take it easy and for 2 months after that whenever i hit my 3rd set of bench i felt that pull again so what i did was hit decline by using DBs and also very important is to ice it right after the workout to keep the inflammation down. its nice being able to hit 4 plates even 3 plates is good too but tear a pec and you can kiss even 1 plate
goodbye.