Complete one Wall Ball on the start of the first minute, two Wall Balls on the second minute, three Wall Balls on the third minute, and so on until you can no longer complete Wall Balls for the number of minutes on clock. (20# @ 10 feet / 14# @ 9 feet) (If you fail to get required number of Wall Balls in a minute – start over at 1 and go up the ladder again. Continue for 20 minutes.