You're saying it's Tyler's profession. That's right. How many people on this board would show up for work with the injuries he has? I guarantee you absolutely nobody would. The problem is, you have no idea how bad his injuries are, and like most professional athletes Tyler shows as little as possible, no point in alerting the competition.
Your argument that his back was good enough one day and not the next doesn't wash. Ever heard of back problems worsening over time? Especially after riding over a bunch of mountains for six hours? I don't know exactly what is wrong with Tyler's back, but I do know what is wrong with Carlos Sastre's since we e-mail almost daily. It's amazing he is still in the race, and his injuries probably aren't even as bad as Tyler's. The point is, a lot of these riders are beaten up beyond belief, and there is not enough time for recovery so they simply deteriorate vay after day. You can survive that if you are healthy, but if you are injured it is very, very difficult. There are riders in the Tour who cannot get out of bed in the morning without assistance, yet they hop on the bike. There is no way you could even imagine how bad it is, and in the absence of knowledge, maybe it doesn't make sense to make simple statements like they should suck it up.
Aside from all these physical issues, you're also ignoring the most powerful muscle to keep these guys going, the brain. you finish the Tour on desire and willpower, and these people are only human. When the body starts to fall apart, even the strongest minds can give in.
Gerard Vroomen
3T.bike OPEN cycle