Is cycling the toughest sport?

Anyone who’s raced a bike knows that cycling can be cruelly hard, but how does it stack up against other gruelling sports? Do we have a valid claim to be competing in the toughest of them all? Dave Nash tests the contention

Anyone who’s raced a bike knows that cycling can be cruelly hard, but how does it stack up against other gruelling sports? Do we have a valid claim to be competing in the toughest of them all? Dave Nash tests the contention