A bit of background is needed for this question. I have a disorder of my middle ear which basically means that I have no perception of balance from there (I constantly feel motion in my middle ear, like just coming off a violently spinning roundabout or fairground ride, although my body has learned to ignore this sensation over the years so I am not affected by it directly, and I balance myself through my feet and eyes).
Anyway, for various reasons, I have never really done any exercise at all my whole life, so I'm very unfit (normal weight due to a carefully controlled diet, but unable to run even 200m).
I would love to start getting fit, so I've set aside some time in my day and have got started with some gentle jogging. The problem is, I very soon start feeling sick and have to stop. Now, I know that it is possible to exert yourself to the point of being sick, but I'm not convinced that that's happening because although I do have to work hard, and feel a bit tired afterwards, I don't really feel absolutely destroyed. I've got a suspicion that instead I'm just getting motion sickness (which I'm extremely susceptible to), and I might have to try something other than jogging.
So basically my question is this: for an extremely unfit person, how hard is to work to the point of being sick? Is it absolutely horrendous work, the sort where you have to push your body past anything you think is possible, and then even further, or can an extremely unfit person get sick pretty easily?
Thanks a lot.