4 rounds, 1 min per station, for max reps of: Tire Sledgehammers Plank Hold Knee-to-elbow Dumbell/Kettlebell Hang Squat Clean Thruster Kb Windmills (Each Arm) Burpee/Mountain Climber Duet Cherry Picker Rotate immediately to the next station every 1 min, the clock does not stop or reset between stations.