So back to school he went. To nail down the way his fingers moved, Menuhin learned every scale imaginable. He learned to play them at every speed. He searched the library for books on violin technique. He went to the best teachers and asked them to explain things the books didn't say. He asked gymnasts and dancers for advice on the most precise way to move his bowing arm. To understand how to control his bowing better, he learned the names of each muscle in the back, upper arms, forearms and fingers. He studied drawings made by Leonardo da Vinci, so he'd know what hands looked like on the inside. Then Menuhin broke his performance down even more. Studying India's exercise system of yoga, he started to understand his breathing as he played.