Chace Crawford decided to train for a triathlon because he was getting bored with his exercise regime.

The 30-year-old actor will compete in the Nautica Malibu Triathlon, presented by Equinox and benefitting the Children's Hospital Los Angeles and revealed he decided to sign up because he wanted to try something different.

He told PEOPLE: ''The biggest problem with exercise is boredom. So that's one of the main reasons I took to the training for this, it switches it up, gets you outside. I also try and get in the gym four days a week, sometimes five if I hit McDonald's at the airport.

''I was about to turn 30 and I figured these are the type of things people do in their 30s. Ya know ... drink vegetable juice, buy curtains, learn to crochet ... the usual.''

And Chace is thrilled to be taking part for a good cause.

He said: ''I've done some things with the Children's Hospital during my time in New York, and getting to spend time with the kids is just something that means a lot to me. This event raises more and more money every year and it may be the best run event of this type out there. I'm proud to be a part of it.''