London, April 22 (IANS) Reality TV star Kourtney Kardashian is pleased with her post-baby butt and wants to devise an exercise regime which will help her keep her shapely bottom.

She gave birth to her first child, Mason, in December last year and piled on lot of weight during her pregnancy, reports contactmusic.com. Although she prefers her new plumper butt, Kourtney admits she needs to keep it in check.

'I want to try to do squats - stuff that will keep the booty up there,' said the

30-year-old who has become very serious about jogging too.

'I am big on running - just putting on my iPod and going for a run by my house. It is a fun way to lose weight,' said Kourtney.