“We no longer think slowly and deeply, but quickly and superficially.”
Before every waking moment of our lives were dominated by screens or ear buds, we spent a vast majority of our non-social time pondering, thinking and letting life sink in. Just like the brain needs sleep to sort out your daily thoughts and emotions, it appears your non-stimulated moments are necessary too. An article from the Journal of the Academy of Management showed that a “bored” brain is actually looking to process past information and trying to stoke up creativity.
I started rehabilitating the knee and cautiously grappled. Within a month I worsened the injury while grappling. Unfortunately, the next day, I was scheduled to run the Tough Mudder at Whistler in British Columbia. I taped my leg up like a mummy and ran the 16 K trek up and down the world famous ski resort. About one and a half months after this, while grappling, I dislocated the medial meniscus and it shot out the back of the knee joint. Not having x-ray vision, I did not exactly know this at the time, but a later MRI revealed it. Finally, at that point I stopped grappling completely and turned simply to rehabilitation while I await surgery. 
Few joints are as multipurpose as the human shoulder. We can walk on our hands, crawl and do push ups. The shoulder is a very sturdy join. Yet no joint in the human body is as mobile. Known as a “ball and socket” joint, the shoulder is essentially a pool ball freely rotating in a tea cup saucer. This allows for free rotation of the arm in all directions. You can literally wave your hands and arms in perfect, large circles as though they were helicopter blades. In comparison, your knee only folds and straightens. It is called a hinge joint for that reason. Even your cervical spine (neck), which does allow for tremendous free movement, does not have as much range of motion as the famous shoulder joint. 
