I am in the "it varies by exercise" group.

OP- you should be using weights that are heavy enough that the last 1-2 reps are hard. So if you goal is 8-10 you's likely use a heavier weight than if your goal is 12-15 reps. If at the end of your reps you feel like you could keep on going then the weight is too light.

Try reading this excellent article by Nia Shanks-- she provides a detailed explanation of why lifting heavy weights at lower reps is so much better for you than endless reps of 5 pound dumbbells. http://www.niashanks.com/11-beginner-strength-training-tips-women/

Anonymous wrote:Ugh, wasn't done typing

I use 6 lbs because I do not want to get bulky like a guy.

Lmaoooooooo what a fool

Do you have any idea how hard it is to "bulk"? On the OUTSIDE limits of possibility women can only put on 12 lbs a muscle in a year and every year after less than that. It is really almost impossible for women to be bulky because we don't produce enough testosterone. If you see "bulky" women it's for one of two reasons:

1. They take PEDs
2. They have a lot of fat sitting under their muscle which makes them look big

Your dumb little 6 lb weights aren't doing anything for you anymore, let alone making you bulky.

Anonymous wrote:Ugh, wasn't done typing

I use 6 lbs because I do not want to get bulky like a guy.

Oooohh you are going to get hammered 1.. 2.. 3...