For some reason I always feel bloated after cardio. Is there an explanation for this?

Do you eat/drink much before the cardio? How long before?

The only time I've felt bloated during/after cardio is when I've eaten too close to the exercise - ideally you want at least an hour between eating and exercise (except maybe a banana or something small just before the exercise, IF it fits your requirements).

I suppose you could also feel bloated from not eating enough before doing cardio. I take a litre bottle of water into the gym with me, and try to sip it regularly during my 45-60minute session. Don't gulp it down, but aim to get through most of it by the end of the session. This might help the bloated feeling, because your stomach won't be totally empty.