Exercise is good. Too much exercise – not good at all.

No offense marathon runners – but you look old. 

Too much of a good thing, even exercise, can take a toll on your body and your looks. Cosmetic physician Dr. Van Park says one marathon Tough Mudder or triathlon every now and then is okay, but long term excessive exercise will hasten ageing. Just look at the faces of regular marathon runners.

Hard-core exercise puts the body under extreme stress which releases cortisol. Over time, those high levels can make you look old inside and out. Even jogging and heavy weight lifting can stress joints and damage delicate protective cartilage.