Things are about to get intense.
Really intense. But just for a short spurt.
It’s called high-intensity interval training, or HIIT. You vary your pace or the intensity of your activity, pushing your limits, and then drop back down to a more comfortable zone.
Then you repeat that cycle -- rev it up, recover, rev it up, recover.
The payoff: You'll burn calories faster, better, and longer after your workout’s over than going at a steady rate.
9Apps 4.9
