Pilates (/pɪˈlɑːtɪz/;German: [piˈlaːtəs]) is a physical fitness system developed in the early 20th century by Joseph Pilates, after whom it was named. Pilates called his method "Contrology". It is practiced worldwide, and especially in western countries such as Canada, the United States and the United Kingdom. As of 2005, there were 11 million people practicing the discipline regularly and 14,000 instructors in the United States.
There is only limited evidence to support the use of Pilates to alleviate low back pain, or improve balance in elderly people. Evidence from studies show that while Pilates improves balance, limited data exists on whether this impacts on falls by the elderly. Pilates has not been shown to be an effective treatment for any medical condition. There is some evidence regular Pilates sessions can help muscle conditioning in healthy adults, when compared to doing no exercise.
In his book Return to Life through Contrology, Joseph Pilates presents his method as the art of controlled movements, which should look and feel like a workout (not a therapy) when properly manifested. If practiced with consistency, Pilates improves flexibility, builds strength and develops control and endurance in the entire body. It puts emphasis on alignment, breathing, developing a strong core, and improving coordination and balance. The core, consisting of the muscles of the abdomen, low back, and hips, is often called the "powerhouse" and is thought to be the key to a person's stability. Pilates' system allows for different exercises to be modified in range of difficulty from beginner to advanced or to any other level, and also in terms of the instructor and practitioner's specific goals and/or limitations. Intensity can be increased over time as the body adapts itself to the exercises.