Policeman breaks planking world record

If you've ever sweated it out at a gym, you'll appreciate that planking is a dreaded exercise.

Planking is designed to improve your core strength, but holding the position for even a single minute can be a real struggle. So just imagine being asked to hold it for more than four hours?That's exactly what Chinese policeman Mao Weidong managed when he set-out to beat - and subsequently smashed - the world record for planking.Weidong, who works for a SWAT team in Beijng, barely broke a sweat as he annihilated the previous mark of three hours and 7 minutes which was set by American athlete George Hood in 2013.And he even managed to score brownie points with his wife along the way, stopping the clock at four and 26 minutes because the time matched her birthday, April 26.A superhuman effort from a super-husband.