This plank challenge workout could be the key to toned arms and flat abs. It takes about 20 minutes (there are modifications for beginners) and will leave your arms feeling like jelly — in the best way possible.
Take this abs and squat challenge and boost your core, leg, and butt muscles and body strength to the max! The three workouts involved in this challenge will help you achieve hot abs and lower body. Build your core until you reach your goal on the day!