The HIIT Advantage

“Irene offers science applied simply and powerfully to bring HIIT to your workouts the right way, for your starting point, for your results.”

Jonathan Ross– Award-Winning Fitness Professional and Author of Abs Revealed

“Irene Lewis-McCormick’s The HIIT Advantage shows you how to get the most out of your workout with short bursts of targeted exercise that will improve your fitness while burning more fat and calories. Irene is a pro—her workouts and advice are top notch!”

Chris Freytag– Fitness Trainer and Health Coach,

“Build a stronger, more beautiful body with muscle-building, fat-burning, high-intensity interval training. Irene Lewis-McCormick breaks down the science and shares individual exercises, complete workouts, and video of exercise demonstrations certain to transform your body.”

Abbie Appel– ACE Group Fitness Instructor, Master Trainer, Schwinn Fitness , Group Fitness Manager, Equinox

Irene Lewis-McCormick, MS, is a personal trainer, international presenter, author, and 30-year fitness veteran. She holds a master of science degree in exercise and sport science with an emphasis in physiology from Iowa State University. She is a certified strength and conditioning specialist with the National Strength and Conditioning Association and holds professional certifications from the Aerobics and Fitness Association of America, American College of Sports Medicine, American Council on Exercise, Aquatic Exercise Association, TRX, YogaFit, and many other organizations. Lewis-McCormick is the author of A Women’s Guide to Muscle & Strength (Human Kinetics, 2012) and a presenter at SCW Fitness, ACSM Health & Fitness Summit, IDEA Health & Fitness, the Mayo Clinic, and many other regional venues. She is a TRX suspension training master course trainer, a Tabata Bootcamp master trainer, an instructor for Barre Above and Xercise Lab, and a master instructor for JumpSport Fitness. She has been a featured presenter in several DVDs, including programs for pre- and postnatal exercise, water fitness, strength training, small-group training, circuit training, Pilates, and foam roller exercise. Lewis-McCormick is a contributor to consumer and fitness publications, including Shape, More, IDEA Health & Fitness Journal, Prevention, Fitness Management, Diabetic Living, Diet, and Heart Healthy Living. She is on the editorial advisory board of Diabetic Living magazine and is a subject matter expert and exam writer for the American Council on Exercise.

She presents with the IDEA Health & Fitness Association, SCW Fitness Education, TRX, Tabata Bootcamp, Xercise Lab, DCAC Fitness Conventions, and many other national venues.