The holidays usually mean two things: eating more and exercising less.
But don't worry, we're not going to tell you to give up sugar and start
training for a marathon (unless that's your thang, of course). Instead,
commit to short bursts of exercise each day to (a) blast calories and
(b) stay motivated. "This challenge is designed to work your entire body
over the course of a week, while making it easy to fit exercise into
your schedule," says Amanda Butler, trainer at The Fhitting Room in New
York City (a studio dedicated to HIIT), who created the plan. "We're not
asking for more than four minutes a day, but once you get started,
it'll...
