Are you supposed to do one set, wait 90 seconds, and then do the same exercise again? I have been doing one set, waiting 90 seconds, and then moving on to a different exercise. After I have done all of them once, I go back to the beginning exercise. Should I be doing 3 sets of the same exercise at once?

usually people will do 3-4 sets of the same excercise. Do the 1st set than rest usually 30-90 seconds than do another set of the SAME exercise for about 3 or 4 times than move on to the next excercise

that's what i was looking for, thanks.

What you were doing was called "supersetting" (if you minused the rest of 90 seconds) and its not a bad idea. Its mostly used with people who are trying to lose weight and can also be used as a good plateau buster.

its a superset with full rest. as jman said, it can help break plateus because it allows your muscles to rest more. ex:

10squats
rest 1 minute
10 bench
rest 1 minute
repeat

so instead of getting 1 minute of rest if you just did straight sets of squats, you get 2 minutes+ rest. that is how i like doing it.

i tend to rotate when i do the superets

great info. i tried doing it the way danny said today. i did 3 sets of the same exercise, then moved on to the next exercise. wasn't bad.

since i really need to bulk up, it would probably be best to do it the way danny described, right? then if i hit a wall on my bulking, i can start rotating styles to keep my muscles guessing.

lol yea. i like doing straight sets sometimes.
when i do chinups with straight sets, my performance falls quicker but the pump and intensity of the workout is higher. i think its a good idea to use it for when you need some variation

Would it hurt my bulking if I did elliptical twice a week? I just bought an elliptical machine a while ago and keep getting the urge to use it. I'll still be keeping my calories up.

No not really. Just keep it under 3 miles or less. Idk if those things can change the resistence on them, but if they can that would be better for you.

Yup, I can turn up the resistance. I'll do it on medium-high for about 15-20 minutes.