Is it due to TRX training? In case you are wondering, TRX suspension training is a form of resistance training, as you can see in the pictures, the rope-like thing is call a suspension trainer.
Do you envy her trim figure? Me too. But fret not, we can have it to. That is, if you work out four times a week doing Pilates, cardio exercises, and this TRX thingy.
Blog readers, I think it's time to get our arses off the couch and work our butts off :o