A wall with hooks and ropes attached to it. Hooks are placed 100 and 200 cm up from the floor, Additional hooks can be put in 3 cm from the floor to be used with ropes or belts. Upper hooks hold two ropes each ( if a hook is too small for two ropes, the second hook can be placed close by). The length of upper ropes should be 150 cm for each rope, and 20 cm for lower ropes..