Touch Jump Touch to Box November 7, 2016ExercisesSSD Box Size: We use 15″ boxes, but any box 12-16″ tall will work. Hand Touch: Outside hand touches the ground on each side. Rep Count: 1x Rep = Each time the feet touch the top of the box. Can be completed for reps, or in an interval format – as below. Clip shows a 25 sec work, 35 sec rest, interval.