Yes it could for people like me, which is why I can't practice. That's because I have a tumour in my carotid sinus, it's already encasing my carotid artery by 50 percent and it causes me a world of horrible symptoms (vision problems, hemifacial spasms, to name a few). There's also something that can happen, I forget the name (some kind of reflex) that cam cause instant death. Supposedly its rare, bit I'm at higher risk of it. I don't want that happening on a practice run when my things are not properly in order.
People need to be aware that even practicing carries risks. Maybe not for you personally, but certainly for others.