by Men’s Health
Fitness fact: Most ab exercises build your six-pack muscles, but don’t do much to burn away the flab that covers them. That’s because moves like situps and crunches don’t require you to burn a lot of calories compared to fat-fighting exercises that skyrocket your heart rate. Our solution: the metabolic mountain climber. It targets your abs, but also forces you to work at a lung-busting pace for a one-two punch that’ll help reveal your sculpted midsection. Ready to try it? Click here to see how to do the metabolic mountain climber–you might just find it’s the best exercise you’re not doing.