Welcome to Gaia! ::

I'm not an expert, but perhaps you tried too much too fast? If you never exercise and then jump into an hour-long cardio workout then that can probably do it to you. Just a suggestion, I've really no idea. o_o

I also feel sick sometimes if I exercise while hungry (maybe five or six hours after the last meal).

If you're sore when starting a workout then it can get worse for a while, and then ease off when you warm up. Stretching after exercise (or in the shower, lol) should help with that, and/or doing a quick warm-up a few hours after.

A) that thing looks fantastically cool.

B) That's a little alarming, there are a few things it could be. If you hadn't eaten for a while before you started you might have had a blood sugar drop. Those happen to me and sadly it's a little crazy, if I don't eat *enough* of a breakfast before going on a ride I'll bonk and it does feel a little like throwing up at first. Then like passing out. >.> Then I look around and eat whatever edible greens that are on the ground if I don't have any food. Hem.

Other than that, what kind of warm up/stretches are you doing? It might be worth looking into,

And other than *those* things, I've no clue. Perhaps the soreness of the work out you did yesterday didn't hit you until now?