Here is a breakdown of what I like to wear in a workout. A couple of things that I do that maximize my movement during workouts is that I get thin dry fit hoodies (from nike and gap mostly) and instead of a long shirt to layer under I like to wear shorts, which give me more flexibility in my workouts.
NIKE DRY ELEMENT LONG SLEEVE RUNNING TOP | $49.97
This is my absolute favorite go to top when I’m at the gym, you can leave the hoodie as is and wear it as a hijab or I like to cut it down from the center to about 2″ down to make the opening around my neck bigger for a little more breathe room.