Don't Exercise!? for real?

so.......i got this test coming up.....i have been testing with the damn faint line (negative) over and over again. I dont trust the faint line. But today i read something that says don't exercise close to the test. Why? If I am testing negative. Is exercising going to unleash some thc. Does fat have a memory? So if i smoked when i was skinny, got fat, didnt smoke for a long time but happened to lose alot of weight close to when i was overweight. The fat would release the? I dont get it. I got a test in a couple days, im testing negative at home but damn....im still paranoid!

All of your questions are answered by doing a Forum Search with the terms "exercise dormant metabolites" and "faint line negative" .