In the ongoing (though I suspect futile) battle against the bulge I've been trying to find what exercises I can incorporate into my daily routine. I'm generally healthy and built relatively thin, but have a terrible posture and was cursed by a slight tubbyness since childhood. Up until now this wasn't obvious but I had inlaws commenting recently so I'd like to get it under control. An obvious start is situps, and I've been trying to start gently with just 20. Now I expected some muscle stiffness -I've not used these muscles for a while, but how much do you just push through and how much should I take notice of this? While I'm here, what other stomach training exercises could I try?