Michael King has been an exercise professional for the past 20 years. He was first introduced to Pilates as a professional dancer. When an injury cut short his dancing career, Michael turned to Pilates, studying with second-generation teacher Alan Herdman and qualifying as a Pilates teacher. He is the founder Director of the Pilates Institute in London where he trains teachers to run classes for Pilates during pregnancy. Michael is the author of Pure Pilates, also published by Mitchell Beazley. Yolande Green has been a fitness instructor for over eleven years, and is a tutor at the Pilates Institute in London. She is currently studying for an M.Sc in health and fitness while researching exercise during pregnancy.