They provoke a "backpropagation" of the force you are exercising in the orthogno...

		malmsteen on Oct 3, 2018 \| parent \| context \| favorite \| on: Ask HN: What things have richly rewarded the time ... They provoke a "backpropagation" of the force you are exercising in the orthognonals of the machine work axis directly into your joints. Risk of injury at heavy weights. doesnt happen with free weights