"I think people shouldn't forget, and it's never been done before, that guys have got to go and endure 10 back-to-back Ashes Test matches," Pietersen told Sky Sports.
"I've been told that a number of Olympic athletes go into some sort of post-Olympic depression or a negative frame of mind - and I'm not saying we're in a depression or a negative frame of mind - but after you've competed at such a level, post that competition, mentally you're a bit fragile. To play an Ashes then another Ashes, and for us being away from home, it's a tough gig.
"I've been told that a number of Olympic athletes go into some sort of post-Olympic depression or a negative frame of mind - and I'm not saying we're in a depression or a negative frame of mind - but after you've competed at such a level, post that competition, mentally you're a bit fragile. To play an Ashes then another Ashes, and for us being away from home, it's a tough gig.
