HIIT Training: 21 Days of High Intensity Interval Training for a Healthy and Ripped BodyHi, I'm Katherine (Katy) Wright, Amazon Bestseller of the "Gut Healing Protocol and Low Carb, High Fat Diet."Over the years I have tried everything under the sun in order to lose weight and stay fit. My enthusiasm for fitness and diet have led me to find out exactly what does and what doesn't work. I've previously written about the subjects of losing weight without...