Cardio-love it or hate it? Honestly, I love cardio! This is a fun HITT workout done on the treadmill. Pick any speed you want on the treadmill, I usually pick a running pace. Run for 40 seconds and hop off. Durning those 20 seconds of ‘rest’ increase the incline by 1 percent. Continue this pattern: 40 on 20 off, increasing the incline by 1 each ‘rest’ period all the way until you’re at an incline of 15 percent. Then work your way back down until you’re at an incline of 0 percent again. It will kill you but you will feel SO good when you have accomplished it! And it’s one of those HITT routines that you don’t really have to think with or keep track of anything, just make sure you move the incline each time you hop off!