http://theconversation.com/best-way-to-avoid-back-pain-lift-heavy-things-93702
Citando:
"The common advice from lifting training is to avoid heavy lifting where possible. However, research has shown that such training is largely ineffective at reducing back pain and back injury. It seems that a different approach is needed.
Human tissue needs to be exposed to loads to become strong – and the spine is a good example of this. Regular loading prepares the joints, muscle and ligaments for normal tasks. Nobody would expect to run a marathon without preparing the body for such loading, so it seems logical that to be able to lift a weight requires exposure to that activity.
Lack of loading has been shown to have damaging effects on the spine. Studies on astronauts have shown that lack of exposure to loading in microgravity causes muscle wasting, spine stiffness and disc swelling. These previously healthy astronauts developed back pain after space flight. Prolonged unloading caused an unstable or weak spine leading to back pain."
