How far fetch are before & after fitness selfies? Does a three minute workout give you a better figure? Personal trainer and fitness blogger Sophie Kay shows just how easy it is to hide the truth.

She says on her Tumblr, "All I did in the three minutes between the two photos was to turn off the overhead light, put on underwear that fit better, twist my body slightly to the side to show off my best angle, flex and, of course, add a filter. So don't pay much attention to those 'before and after' shots!"

So easy?