Updated: Thu, 13 May 2010 06:33:10 GMT | By Flora McCraith, MSN


Tone up while working it underneath the sheets.



Fitting regular exercise into your busy routine isn't easy and a month’s gym membership can go to waste because of that. What you might not know is that you’ve been getting regular exercise every time you have sexy time with your partner. The more challenging a sex position is, the more exercise you get. Read on and find out which muscles get toned from the seven different sexual positions we’ve listed down.