Pilates is a body conditioning routine that seeks to build flexibility, strength, endurance, and coordination without adding muscle bulk. In addition, pilates increases circulation and helps to sculpt the body and strengthen the body's "core" or "powerhouse" (torso). People who do pilates regularly feel they have better posture, are less prone to injury, and experience better overall health. Joseph H. Pilates, the founder of the pilates exercise method, was born in Germany. As a child he was frail, living with asthma in addition to other childhood conditions. To build his body and grow stronger, he took up several different sports, eventually becoming an accomplished athlete. As a nurse in Great Britain during World War I, he designed exercise methods and equipment for immobilized patients and soldiers. In addition to his equipment, Pilates developed a series of mat exercises that focus on the torso. He based these on various exercise methods from around the world, among them the mind-body formats of yoga and Chinese martial arts.Joseph Pilates believed that our physical and mental health are intertwined. He designed his exercise program around principles that support this philosophy, including concentration, precision, control, breathing, and flowing movements.