You can get in and out of the gym fast and still burn tons of fat. The trick? High intensity intervals (HIIT). Interspersing short bursts of working at your absolute max effort with brief rest periods can seriously rev your metabolism. How? It's an effect called excess post-exercise oxygen consumption, or EPOC, and triggering it can help keep your metabolic rate up for hours after you exercise. Essentially, pushing yourself to your physical limits, even for mere seconds, helps create an oxygen 'debt' and while that doesn't sound like a good thing, it most definitely is when it comes to helping you burn fat. What's more, this type of workout triggers fat-incinerating hormones like the Human Growth Hormone (you produce a lot of it when you're young, but production peters out as you get older and more sedentary.) Since more and more research is piling in confirming these facts, you need as many HIIT workouts as you can get. So, we decided to add to our 8 Amazing Fat-Burning Interval Guide published last year to bring you another 8 to add to your fat-fighting arsenal.
Hope you brought an extra t-shirt and wore your deoderant, because these circuits are no joke.