Correlation =/= causation. I still haven't seen research that leads me to think that sleeping too long directly effects your health negatively as this article

Correlation =/= causation. I still haven't seen research that leads me to think that sleeping too long directly effects your health negatively as this article states. It is more likely that unhealthy people sleep longer due to overall health issues, not the other way round. Having said that, there are some other good, practical points later on in the article.