@justcellus: DON’T DROP YOUR KNEES! Most people can’t finish this one..can you?! This is the PLANK PRISON 300 CHALLENGR 🔥 300 reps. 5 moves. 1 rule…don’t let your knees touch the floor! If you finish this, you’re BUILT DIFFERENT. The Challenge: 100 Shoulder Taps (each arm = 1) 80 Mountain Climbers (each leg = 1) 60 Bear Plank Walks (up and back = 1) 40 Plank Kickbacks (each leg = 1) 20 Push-Ups 🚨 Goal: Complete all 300 reps without letting your knees touch the floor. 🏆 No Tier Rankings! You either PASS or FAIL 📌 Save for your next workout 💬 Comment your result 👥 Share with a friend you know you can beat #plankchallenge #fitnesschallenge #core #workoutmotivation #ironrank