From rave workouts to Zumba and spin, the world of modern exercise is an eclectic mix of fun-filled activities, but gyms haven’t always been so innovative.

Most exercise centres these days are packed with dozens of different high-tech machines strategically designed to work every muscle in your body.

But in the 1930s it was an entirely different world. Far from our ultra-lightweight cushioned trainers and breathable sports wear, ladies are seen wearing rather tight belted all in ones and pumps.