We all know this. Sleep matters, but for one reason or another it´s always the one factor people tend to pay the least attention to. The diet is strictly vegan/paleo/whatever and the training is scheduled down to the very minute and superset, but sleep and basic sleep hygiene is rarely prioritized nearly as high.
It´s stupid and you know it. Some would argue that makes you stupid.
Here is another reminder:
Image credit: Business Insider