In boxing movies, you will often hear boxers ‘hiss’ when they throw their punches – and this is an actual boxing technique. Breathing and activating your diaphragm when throwing shots has the dual benefit of ensuring your core is engaged in the punch and making sure you maintain your oxygen levels, especially during long combos. I try my best to breathe in when I bring my punches back, and breathe out when I punch, making sure I keep my oxygen levels up to help fight off muscle fatigue. This one takes some time to get used to, so don’t feel bad if it doesn’t seem natural at first.