low weight high reps or high weight low reps?

Low weight and many reps is used to produce definition (and incidentally helps to increase muscular stamina). High weights are used to bulk up, to increase muscle mass. This is based on the information i was given in the weight lifting classes i took at university to meet my physical education requirement. It is entirely possible that some one will show up to disagree--but that is what i was taught.

thanks.

Set- Sounds like you know what you are talking about........................or else we both got the same wrong info!

OGIONIK - Whatever muscle that you exercise, be sure that you also exercise the opposing muscle. For instance, if you are working biceps, then do some triceps work.

Set and Phoenix are right.....but it helps to know more information... for example

First thing, I think your making a mistake by not taking on a full body exercise program. It would be healthier to do 1 exercise for each part of your body than it would be to focus on only those areas you listed.

Also, for the most muscle mass you want even fewer than 8 reps, probably 4 or 6. And you should barely be able to lift the last rep. If you have a spotter this is really easy, if not be careful. When I'm bulking up I usually load enough weight to try for 6 reps and be happy if I can only get 4. If I can't get 4 then I remove weight the next workout, if I can get 6 I add weight. If I get 4 or 5 I stay.