@Reyn,
Ike's injury is the worst so far and he did it getting into a taxi lol. Then the minor stuff...blisters, a rolled ankle or two and I think some of the teams suffered mild dysentery.
I know what you mean, though. I think if you'd watched Burnett's Eco Challenge (upon which this show is based) you'd be a little less concerned, though. Those races were wild -- and the one he produced in Morocco saw at least half of the 40 or 50 original teams (from around the world) dropping out from injury. The kayak discipline in Morocco was on the open sea and there were 6 - 10' swells that day. Air rescue was plucking people out of the water left and right and most ended up in the hospital. On the bike ride, a woman from Finland fell asleep just before dawn (they raced 24 hours a day) and plunged 40 or 50' down a canyon. Amazingly, she wasn't seriously hurt, but there were a lot of busted knees and ankles, hypothermia, dehydration/hallucination, and exhaustion victims throughout the race.
Then, at the end of 5 or 6 days it was over and all they wanted to know was where the race would be held next year -- even the ones who DOR'd from injury.
Oh, and the first place team of 4 split $25K in prize money -- second place split $20K, so they each got a whopping $5,000 lol (which wouldn't even cover the cost of their race gear).
There was a team of NYC cops (I think that was Morocco) who said they just wanted to prove nothing was as tough as the jungle that was New York. Their goal was to place in the top ten and I think they came in 7th. They were ecstatic.