Pain = Growth. The sweat dripping down your face, that heart pumping fast, blood flowing through your veins, and that burn you feel on the last rep is whats is going to make you stronger. You are either going to grow from this or it's going to make you bitter. Learn how to control your breathing because thats how you manage that pain because it is only temporary. Once you make it to the other side you are going to be proud of yourself to see how far you came.