This is true.
The nervous system is made up of the brain and the spinal cord
The rotator cuff is a muscle worked the most by pitchers there for being to most common to grow on a pitcher
By slowly introducing the changes and not implementing them all at once.
Since training and stretching for flexibility is a physical activity, I would say yes you should record it.
The discussion board is the virtual stand-in for a classroom in a learning management system.