Speaking on ITV's This Morning, he said it was "amazing" to be able to relax and enjoy time with the newborn twins following his gruelling pre-Olympic training regime, which saw him running an average of 17 miles each day.
The Olympic hero said: "It's amazing. As a parent, when you have kids born, it's the happiest time of your life."
He added that after a regime that required him to run around 12 miles in the morning followed by a further five in the afternoon, he was enjoying his rest.
"When you have time off, you can kind of relax," he said.
"You want to catch up on what you miss.
"I love spending time with my family, having a laugh, going to the park, and just doing what normal families do."