cadfael

Well, I'd up the amount of time on the treadmill or elliptical, but not get your heartrate so high. At the heartrate you're hitting, you're getting cardio benefits, but not as much weight loss as if you were actually at your target. As for the weightlifting portion, it's hard to say without knowing how strong you are. For exercise that'll build lean muscle mass, go for a weight that you can do something along the lines of three sets of twenty without failing on the last set. (If you were trying for bulk muscle, the advice would be pretty much the opposite -- high weights, small sets.) Make sure, for the sake of your posture and alignment, that you do exercises in pairs. Don't work your biceps without also working your triceps, etc.