The physics of horse whispering.
It was a simple law of physics which taught Mary Wanless to understand horses.
The scientist-turnedhorse whisperer discovered the way a rider distributed their weight transformed a pony or mare's behaviour.
And this weekend, Mary shared the science in a masterclass at Solihull Riding Club.
``There is a formula which underlies the art of riding and I have worked it out,'' she said.
``Riding requires a core stability. That means riders have to stabilise their muscles so that they can'tbe knocked over on the horse.
``It's like a schoolchild with a rucksack. It can be re-packed to be more comfortable and enable the child to walk better. That's how it is with a rider and a horse.
``Sometimes I see a rider who is so angst-filled, they are actually torturing their horse without meaning to.
``But when the rider changes, the horse changes.''
Mary reveals that she sees it as her mission to expose the mystery of how to ride correctly.
And so far the 52-yearold, who runs a riding centre in the Cotswolds, has shared her knowledge with equine enthusiasts inCanada, North America and Australia and become something of a phenomenon in the riding world.
Solihull has been her third stop on a month-long tour of Britain.
Mary said she has loved horses ever since she pressed her nose against a car window to marvel at one aged four.
But she found herself stuck in a rut during riding lessons in her teens.
She said: ``I studied physics at university and decided that there must be a scientific answer to riding.
``In many ways I saw this like an experiment. I kept asking questions and demanding answers. I wrote down my findings. Iwas convinced there was a formula to it. There was something my riding teachers were not telling me, so I read every book available on the subject to find the secret. Then I hit upon it. It was the precise way you organise your body that was the scientific answer.''
Now she is training a rider from Louisiana for the Olympics and has cured scores of people with a phobia of horses.
She finished: ``Horses are so powerful, big and have such a joie de vivre, but sometimes they are so stoical it moves me to tears,'' she added
Mary Wanless, who lectures on building core stability to improve horse riding. Jo Hayward (age 20) is riding Aztec