Fashion: Stretch: the rules

The recent NHS "Take the Stairs" campaign may have had some success, but it hasn't got the same pizzazz as Britain's favourite public-health advocate: Green Goddess Diana Moran. The emerald-leotarded fitbit turns 70 this year and is lithe, living proof that bending and flexing before breakfast will keep you tight, trim and, more importantly, on-trend.

Her trademark skintight number (although whether it's the same suit 25 years on remains unconfirmed) still encases her as snugly as ever it did – and it's also a perfect fit for fashion's current spandex obsession.

Also undeterred by the passing of a quarter-century, 1980s sensation Pam Hogg relaunched her label in London last February with a collection crammed with club-kids in catsuits.

Last season, baggy jumpsuits and hideously named playsuits were key pieces. This season's look is more Starship Enterprise and retro-futurist, so think graphic colours and go-faster stripes. And don't forget to breathe in; catsuits require nothing less than gruelling physical perfection – in a spacesuit, no one can hear you scream, but everyone can see your love handles. You'll need Ms Moran's keep-fit moves for this techno trend.

Further proof that spandex belongs on breakfast TV was lovable automaton Beyoncé's performance on The Today Show in the US in an all-black number, earning her the soubriquet "Sprayoncé". She's one of maybe three women in the world with curves but none of the attendant flesh. Others should remember that spandex is a privilege, not a right.

Pam Hogg's pop-up shop opens on Newburgh Street, London W1, on 13 May