The Strapz trainer you work with your own body weight. You are thus able to determine themselves. The gravity and intensity of exercise A Suspension Trainer is a true full-body trainer: the whole body can be trained with this system and there are numerous exercises denkbaar.Voor the feet and ankles is a padded loop allowing to carry out exercises in which the feet are still in the loop is comfortable. Think of mountain climbers for abs or hip- lifts for the hamstrings. This Strapz of SKLZ have a numbered grid so you have the same length at all times to train.