I am sorry where did you hear about pp increasing Heart size? Anywho, I have ran Phera for way longer than need be, and had no adverse effects from it. I have used for a kickstart, and done cardio with ease. If you are trying to cut, just remember to keep your sodium levels lower than usual as it does raise your aldosterone levels. Thats what causes the bloat. Ride the wave of PP, as me and Poopypants are the PP pimps of all time.