I'm back in my pre-baby skinny jeans - and I only had to do 38...

... 1,000 calories in an hour, and there are DVD-based versions including TurboFire, which features kick-boxing moves, and P90X which involves some serious-looking gym equipment. But HIIT also courts controversy. BBC presenter Andrew Marr, 54, believes ...

http://www.dailymail.co.uk/health/article-2533754/Im-pre-baby-skinny-jeans-I-38-minutes-high-intensity-exercise-week.html?ITO=socialnet-twitter-dmailhealth&ns_mchannel=rss&ns_campaign=socialnet-twitter-dmailhealth