I can't believe he's turned down the opportunity to test next week, especially given that he's never driven a car with such speed for at least a decade.
He's obviously an extremely fit guy given his idea of relaxation, but nothing he does outside of F1 can prepare you for the strain the neck in particular goes through in the car.
I know they're saying that the upgrades on the car means it won't be the same come Monaco, but I guess more to the point is that Monaco isn't the same and has a fairly slow average speed with no really fast corners, and that general fitness will be sufficient, but I'm still surprised - why would you turn down the chance? In F1 data and experience is everything. It all just seems half-hearted.