Kate Hudson prefers activewear to designer clothes.

The actress - who has sons Bingham, two, and Ryder, nine - says her busy lifestyle means she is most likely to reach for her trusty sweatpants and a vest top than an expensive Cavalli gown.

Asked whether she plans to design ready-to-wear after the success of her workout line Fabletics, Kate quipped: ''I look forward to designing all sorts of things. [But for now] as a mom, how often am I on a red carpet and how often do I wake up and take my kids to school? It's a no-brainer that I'll probably be wearing [activewear] more than I will a Cavalli dress.''

Kate - who previously branched out into fashion design by collaborating with Ann Taylor - hopes women will follow her lead and embrace her functional yet stylish new clothing range.

She said: ''I live in this type of wear. All day, I pretty much have something that I work out in or plan to work out in. [The idea is] for women to have athletic wear stylish enough that they can wear it all day.

''The fact that we are able to sell at [this] price [around $60 for an outfit] point with the materials we are using ... is just amazing. It is hard to find [activewear] at this affordable price.''

The 34-year-old star says her lifelong love of exercise was passed down from her fitness-fanatic mother Goldie Hawn.

She added in an interview with Fashionista: ''I've always been passionate about fitness and seen its effects on the longevity and vitality of [my mother]''.