How long should I wait....

at least an hour but best is 2 hours from what i know. some foods are digested faster, other foods slower, so probably makes a difference as well. i have heard in some workout videos they say you shouldn't eat a certain number of hours not only before but also AFTER...

Personally. I can eat carbs then exercise right after I eat. With protein I have to wait at least an hour with fish and 2-3 with chicken/beef/ pork. I have to wait 15 minutes after drinking or I will hear it sloshing.

there is really no need to wait for any extended time...it takes 12 hours to digest food....

you can eat before and should eat protein and carbs within 30 mintues after weights

no, there sure is a need to wait, it depends on the workout i guess. i trained karate some years ago and the trainer always told us we shouldn't eat at least 1 hour before the training. i've also seen it on videos, e.g. calanetics, they said 2 hours before and 3 hours after. both these are very intensive workouts with a lot of body movement and food can cause serious problems. i realize that you being a man don't do calanetics so this doesn't apply in your case strength training and monotoneous excercise like riding a bike shouldn't be a problem since your body sits in pretty much the same position but imagine you have to run, jump, roll, squat, shake, etc. all in succession, i'm telling you i once ate this orange before my karate lesson and it takes like 30 mins till i get there and once we started i could feel the orange coming back into my mouth... (and fruit is the fastest possible food stuff to pass through the stomach)