What happens to your body if you do 50 push-ups every day for 30 days? Day 1. By around rep 40, your arms start burning. You need breaks and your form becomes shaky. You finish feeling proud, but your muscles are on fire. Day 3. You wake up sore. Your chest feels tight and your triceps hurt. Tiny tears are forming in your muscle fibers. Your body feels confused but begins to adjust. Day 7. The soreness starts to go away. Your nervous system adapts to the movement and you take fewer breaks. You s