it is used when it’s too far to chip, but does not require the full swing. obviously, box jump exercises are out of the question, but you can try simpler exercises like jumping rope or high knees. is it a game which have to play with others? it all depends on what’s in the particular budget. i got lost at that point too, i had no idea the "add force" group was supposed to replace "jump" either. nothing hurts more than the horrible feeling that comes when you feel you are losing your child in front of your eyes. 