"Matt is absolutely the best client anybody could ever hope for," Walsh told E! News. "He is hard-working and he is funny as hell. So we keep it light, but we work really, really hard. He sees and feels the benefits of training the way we train. My philosophy for training the movement has helped him get past back pain, shoulder pain."
At the event, Damon was accompanied by his wife, Luciana Barroso, with whom he shares four daughters.
"You want to live longer and health because you have these kids and you want to play with them and go to Disneyland and you want to do these things without pain," Walsh said. "And that is the focus we took with him."