I am 5'9 1/2" and weigh 140lbs. I have recently lost 30 lbs. through diet and exercise; tae-bo mostly, with resistance bands and walking my dogs. I am toned from the resistance bands, but want to get more cut and add muscle. My goal weight is 135, and then I want to add 5 lbs of muscle to get back up to 140. Here's the question: Should I keep doing what I am doing until I get to 135 and then start lifting? Or, should I start lifting now and just replace the fat with muscle? Also, is a gain of 5 lbs of muscle unrealistic for a girl and how can I measure my gain? Thanks and I hope I'm not asking q's that have already been answered!