http://shine.yahoo.com/tag/500 calories http://shine.yahoo.com/channel/health/biggest-loser-club-burn-baby-burn-289775/ How can you burn off at least 500 calories in half an hour? Ah! You're gonna have to watch this quick video of The Biggest Loser trainer Bob Harper to find out. (But you'll be glad you did!)<br> <br><embed type="application/x-shockwave-flash" allowScriptAccess="never" src="http://d.yimg.com/static.video.yahoo.com/yep/YV_YEP.swf?ver=2.2.30" flashvars="id=10235673&vid=3724536&lang=en-us&intl=us&thumbUrl=http%3A//us.i1.yimg.com/us.yimg.com/p/i/bcst/yp/rodale/3200/73460757.jpg&embed=1" height="322" width="512"> nospam@example.com () http://shine.yahoo.com/channel/health/biggest-loser-club-burn-baby-burn-289775/#comments http://shine.yahoo.com/channel/health/biggest-loser-club-burn-baby-burn-289775/