Active Isolated Stretching (AIS) is one of the methods of stretching used by today's athletes, massage therapists, personal/athletic trainers, and professionals. Active Isolated Stretching allows the body to repair itself and also to prepare for daily activity. The Active Isolated Stretching technique involves the method of holding each stretch for only two seconds. This method of stretching is also known to work with the body's natural physiological makeup to improve circulation and increase the elasticity of muscle joints and fascia. The creator of Active Isolated Stretching is Aaron L. Mattes. Aaron Mattes has developed this method of proper athletic stretching over the past 35 years, working with thousands of patients, doctors, and health professionals. This can be an important tool to improve flexibility and help alleviate problems associated with many over-use injuries such as carpal tunnel, tennis elbow, lower back problems, and other ailments resulting from a lack of flexibility.