stomach ache

[dark_horse]

during extended sessions of sitting at the poker table without keeping good posture in mind, i often experience stomach discomfort. this is most probably because i am sitting with bad posture, hunched over for long periods of time, and my stomach is squished in an unnatural position. i try to make sure to sit up straight so it doesn't get this way but... anyone else experience this on a regular basis? once the pain sets in it takes time for it to go away, and it probably affects my play.