Does your workout routine take a hit during the busy holiday season? High-intensity interval training (aka HIIT) is the perfect solution! Try this no-equipment, 15-minute fat-blaster from certified personal trainer Jessica Smith anytime, anywhere (it's perfect for hotel rooms or smaller spaces) to torch twice the calories in half the time.
How it works: This super speedy circuit uses a 2:1 work to recovery ratio, which means you'll be pushing yourself hard for a full 2 minutes before taking a 1-minute active recovery break. The work intervals are meant to be intense (a 9 or 10 on a 1-10 intensity scale), but always make sure you can maintain good form during the exercises. If you can't make it through the full 2-minute window, do the best you can and go into the recovery interval sooner if necessary. And if some of the moves feel too challenging, you can repeat any other set in its place.
Warm-up: Get your blood pumping with a few minutes of simple moves like marching or jogging in place, jumping jacks, squats, and lunges for about 3 minutes.
