Retired footballer David Beckham has revealed that he likes to people-watch when coming up for designs for his H&M bodywear collection.

Promotional shots of the 38-year-old wearing his new range in a gym changing room were released this week.

"I think people-watching inspires me because you are able to sit in the street or walk down the street, and see people in different items and get ideas," the Daily Mail quotes Beckham as saying.

"From the things they have on, or the design, or the shape, and I think you can get ideas and inspiration from that."

Beckham's collection, which began as just underwear, now includes sweatshirts and pajama bottoms.