Acroyoga is more vigorous than many traditional forms of yoga as exercise and may lead to more injuries.[8] Strength training is accomplished through repetition of exercises like push-ups, hand walking and handstands.This involves the base partner keeping arms and legs straight to maximize the weight load on bones rather than muscles to support the flyer.[12] A series of acroyoga poses that are repeated in a continuous flow is called a Washing Machine.[15] Also in 2003, AcroYoga International was founded by Jason Nemer and Jenny Sauer-Klein in California.