"The natural end to the fight or flight response is intense physical activity. If the threat was real, they’d be fighting for their lives or running for it. When there is no need to fight or flee, there is nothing to burn up the neurochemicals and they build up, causing the physical symptoms of anxiety."

They are training you on release neurochemicals that are affecting your ability to focus on anything but the next "hit of chemicals" which in turn is affecting your sleep.

Which in turn is creating you into an even easier target.