Popsugar Fitness Workouts 25-Minute Muscle-Building Boxing Workout: Anthony Crouchelli Punch Your Problems Away and Build Strength With Anthony Crouchelli's Home Boxing Workout May 6, 2021 by Samantha Brodsky View On One Page Photo 9 of 9 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Block 3, Exercise 3: High Knees Place your feet about hip-width apart. Quickly drive your right knee, then left knee, toward your waist, keeping your core tight and swinging your arms. Continue alternating knees in a running motion, staying on the balls of your feet the entire time. Continue for 30 seconds. Previous Next Start Slideshow WorkoutsStrength TrainingHome WorkoutsBoxingCardio Strength Workouts30-Minute WorkoutsFull-Body Workouts