Advice on excercise

I stared out working out at home on my treadmill and weights. I started out a half hour in the morning and half in the evening on the treadmill and 20 minutes of strength, and then I switched to evening work outs not a morning person. Escalated to an hour on the treadmill and a half an hour strength doing some sort of exercises I found on cable ON-DEMAND fitness. I did that for about 2 months losing about 30lbs. Starting weight 285-290lbs current weight 206lbs, 5”9 that was accomplished in 6 months. Problem is I started to workout 80 minutes on the treadmill 5 days a week and 90 minutes on the weekends along with strength. My knees began to hurt very badly, I learned that I was spending to much time on the treadmill, you should never stay on there longer than an hour it’s bad for your knees, I did 1.5 – 3.0 incline. So I stared the gym 1/7/13 started working out at home 8/20/12. Currently I am taking a week off from cardio because I have to rest my knees, exercise became and addiction for me now that I go to the gym I am in there for 2-3 hours. Anyway, my advice is start with a lot of cardio and a little strength and when you’ve lost a nice amount of weight start adding more weights to shape and sculpt your body. Learn you body shape and work out for it, I am an hourglass shape so I really didn’t need to be doing hours of cardio, I found out now that because of how I am proportioned to much running and jumping is bad for my knees. The body shapes are apple; pear, hourglass, and rectangle, Body types are Ectomorphs, Mesomorphs, & Endomorphs. Get educated so that you won’t risk injuring yourself and so that you cannot work out more efficiently. Best wishes!