i have heard a lot about tubing on this website, but i never have figured out exactly what it is. so what exactly is tubing?
That’s a “tube” and you just do a series of workouts and such. I’m sure someone can give you more info on certain workouts you can do.
“Tubing” usually refers to certain exercises for the shoulder performed using elastic tubing for resistance. There are equivalent exercises that can be performed using light weights. Look here for examples of both: