Our trademarked approach to adolescent fitness training has been honed over thirty five years in the results driven world of elite athletics where injury prevention, performance, and advanced recovery techniques must go hand in hand. We have distilled all the hype in the fitness world to include only safe exercises and healthy training plans with a proven track record of success!” – CEO Robert Forster, PT

PHASE IV is the leader in scientific health and fitness training programs for adolescents. All programs are overseen by Physical Therapists, Exercise Physiologists, Functional Health Coaches and Nutritionists.

PHASE IV advanced scientific training concepts offer student athletes an ethical performance edge, as well as a critical foundation for all Jr. High School, High School and College athletes.

PHASE IV Fitness Academy:
  • For 8-18 year olds
  • Open to all skill levels and sports for boys and girls
  • Builds strong bodies protected from injury
  • Age-appropriate strength, flexibility, nutrition, weight management, and conditioning programs
  • Proven to protect against injury, improve posture, balance, alignment, speed, and performance.

    To sign up or find out more, call 310-582-8212 or email
  • Proven effective in the development of hundreds of local student athletes, as well as NCAA competitors, and the world’s best athletes, including Jackie Joyner-Kersee, Pete Sampras, Maria Sharapova, Allyson Felix, NFL, NBA, MMA, Wrestling, Cycling, & Ironman World Champions.


    PHASE IV offers the most comprehensive science based training and nutrition programs available anywhere! We make you better, and keep you healthy and competing longer. If you are interested in improving your performance, managing your weight, and preventing injury, we will design a periodized training plan for you, complete with periodized strength and flexibility training.

    Our programs have been honed over 35 years in the results driven world of elite athletics, and with thousands of student athletes who have chosen our science based approach to achieve complex performance goals, INJURY FREE.


    At PHASE IV our team of experts assess and train athletes in two broad areas of athletic performance: structural preparedness and metabolic energy production. The ability to produce energy efficiently to meet the demands of your sport is paramount for success. At PHASE IV we utilize scientific data culled from physiological assessments including RMR and VO2 testing.

    From these results we create a customized measurable Periodization Heart Rate Training Plan, and it has consistently produced the best athletic performances across all sports for the past thirty-five years!

    Comprehensive Run Training

    The PHASE IV Running Program draws on 35 years of experience helping athletes achieve injury free peak performance and aerobic conditioning. PHASE IV Running Program is the most complete science based training program available anywhere. This program uses scientific analysis to unlock the intricacies of personal physiology, and replaces the guesswork that characterizes most generic coaching programs.

    We will first analyze the aspects of healthy running: current fitness, strength and weaknesses including flexibility, joint stability, and alignment, running mechanics, nutrition and recovery strategies. From this data your team of exercise physiologists and physical therapists will construct and guide you through a comprehensive running program tailored to your personal physiology and performance goals.


    Working against water’s natural resistance makes for a healthier more balanced workout than is possible on land, with virtually no risk of damage to the body. For both exercise programs as well as rehabilitation, active recovery, and cross training, pool workouts build aerobic and anaerobic fitness, muscle strength and tone, flexibility, speed, good body alignment and agility. The PHASE IV Waterpower Performance Program© can be conducted either in our private facility, your home, or other location.



    Honed over the last thirty five years in the results driven world of elite athletics, and every day with clients just like you, we know that the essential foundation of exercise is the FORSTER STRUCTURE PROGRAM© Strength and Flexibility Training. The vital component of fitness is healthy resilient joints and muscles, with increasing flexibility and strength to adapt to life, sport, and aging. Flexibility: During exercise our muscles shorten; therefore, the connective tissue must be stretched to maintain full range of motion and good posture. As we age, connective tissue naturally tightens and begins to lead to functional limitations. These limitations lead to altered mechanics of the joint and eventually joint wearing (Arthritis). It is the one aspect of aging we can reverse. Discover the safest and most effective stretching techniques to help you perform better, prevent injury, improve your range of motion, and aid in your recovery from exercise. In this video you will learn: • The safest and most effective stretches for each part of your body • How to incorporate a safe and effective stretching routine into your active lifestyle • The importance of stretching in developing healthy joints and muscles for life • How stretching aids in the recovery process and helps to prevent injury • The performance benefits of a proper stretching routine in sport and training • How stretching improves your range of motion, improving athletic performance