Priska Hirt, is training to be an equine physiotherapist, Switzerland

I've always had back pain, for as long as I can remember. It spread into my legs giving me sleepless nights. After I'd really tried out almost everything, I thought this would be worth my while now. Especially as I know that your shoes are hugely important, and look out for it. So I went into a shop one day and had a look at everything. At first they gave me some shoes to try out, which I thought was great. I didn't want to spend that much money at first. I'd then only had these shoes on for 5 or 10 minutes when my knee hurt. At first I was appalled. They'd warned me about it, but I wouldn't have thought it would hurt that much. And then I was given a kyBounder and told to exercise on it 6–7 times a day. After just two weeks I realised that I could now stand on it on one leg without it hurting. Then I brought the mat back and bought my first pair of shoes. I haven't had any problems since.