The elite diver revealed he's in training for a four-day trek rowing, cycling, running, and swimming event from London to Plymouth. Daley said the effort is for a good cause, raising money as part of the Hell of a Homecoming for Red Nose Day campaign for the Comic Relief charity organization.
"I've never done anything like this before," Daley says in a recent promo video. "I mean, I've trained for the Olympics, but I've never done any kind of endurance training, let alone swimming in that freezing water. Let me tell you, it's cold."