i have been hearing many people say that squats and deadlifts are extremely diffiult and every time they do them it makes them feel sick or like they want to throw up. I never feel like this; i feel tired and out of breath like i just ran but i never feel that stressed. Is it normal to feel sick or are you supposed to feel like this when you do squats b/c i dont. I do 8 reps 3 sets with heavy weight(for me).