I used to lift about 80lbs bench pressing doing three sets of 10. I looked littler than I am now because I had such low body fat from having more muscle on my body. It was not bulky or big. I would have to rest about 2 minutes in between sets or I could not complete my next set of 10. I also worked my legs in this way. I had a really hard time keeping my weight up enough while doing this so I cut back on the weight lifting. I looked too skinny. I have a little more padding now. I still exercise but on a treadmill now and a swiss ball because I herniated a disc in my back carrying my treadmill into the house. I don't think I will have the guts to try weights for a few months and when I am not in pain anymore. But definately you need to have about 1 1/2 minutes between sets. This way you can recover enough so that you can lift properly so as not to hurt yourself. I have rushed through feeling like I did not need a break in between only to pull something and hurt the next day.