American HIIT Morning Workout

# American HIIT Morning Workout This efficient 20-minute workout combines cardio and strength training using High-Intensity Interval Training principles developed in American fitness labs. ## Science-Backed Benefits - Burns calories for up to 24 hours post-workout - Improves cardiovascular health - Builds lean muscle mass - Boosts metabolism ## The Workout Alternate between 40 seconds of intense effort and 20 seconds of rest. No equipment needed - just your body weight and determination. This workout philosophy emerged from American sports science research and has become a global fitness phenomenon for its efficiency and effectiveness.