No more than about 110 bpm because of my heart. The Garmin heart monitor I bought works great. I am glad I bought it. The other day I messed up again doing squats and my rate got up to about 145 and it felt like my defibrillator might go off again. Luckily it must have not been ventricular tach and just normal sinus tach. It slowed down and I was fine. Looks like I am going to have to stop my set even earlier now than I used to. Tried doing 26 reps when I got zapped first time and then the next time I mention now I did 22 reps. The next leg day I did only 10 reps and was fine. Going to have to play it extra safe now. Sucks not being able to push it hard at all. Scares the shit out of me now, feels like death is coming.