With summer fast approaching; MSNBC offers up 7 ways to boost your metabolism, and hopefully help you get into shape.

One tip I (and the Body for Life system) definitely approves of;

Speed play (aka Fartlek) — Fartlek, commonly known in the U.S. as interval training, is the Swedish word for “speed play.” Interval training or speed play is a great way to pump up your metabolism and make your workouts more fun. Interval training alternates short bursts of intense activity with lower intensity activity. For example; alternating sprints with a slow jog, or powering up a hill followed by an easy downhill lope. Interval training teaches the heart and muscles to use oxygen more efficiently.

Read the other 6 here