Hula-hoop Pilates? Rebounding? Cardio-spinning? Give over.

Any self-respecting human knows that cleaning out your closet is the most harrowing workout around.

Haul your old clothes to The Exchange, a new secondhand dress shop from interior designer Birgit Israel. The boutique sells your used designer clothing and accessories; you get half the profit.

Really groovy pieces only, please: big names like Prada, Anya Hindmarch and Vivienne Westwood go down a treat, but items by independent designers will do as well. A just-opened second location offers secondhand designer menswear, children’s wear alongside more frocks for the ladies, and a special vintage corner — authentic Chanel, Givenchy and YSL.

Drop in even if you’re not dropping off.

You’ll find it a highly enjoyable exercise.

The Exchange, 279 Fulham Road, SW10 9PZ (020 7376 7277); 72 Gloucester Road, SW7 4QT (020 7052 0028).