Amongst the most annoying member of the gym is, without a doubt, the one that just loves being fit and wants everyone to know it. They'll do all the classes. They'll run with a glittering smile. They're bodies will refuse to perspire. What's more, they're so painfully bloody nice. If you're having problems making a machine work, chances are they'll bound over to you, all teeth and muscles and offer to help. On completion of their 'happiness disease trade-off' they'll offer you a fist-pump of joy and maybe a mouthful of protein shake. Take this opportunity to punch them in the face. Actually, it's wrong to say that. Sorry. And even if you did, they'd find a positive spin on it and hug you before going off to Yoga class.