I’m at 26 y/o male having weakness in arms and legs with fatigue what could be causing this ? Lately the weakness has been off and on for the most part I have no real past medical history

Well you see if you dont follow ur parent's expectations or rule you're going to get a beat

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.

It's called the nephron.