have you tried the gazelle machines? they really work for me, and when i use them for like an hour a day, it shows really nicely! it's an all over machine, and works EVERY muscle group. i just went out and bought another one, because my last one was left behind at my mom's house several years ago and she gave it to a friend. just a thought!
modified because i wanted to put in that if you're like me and your joints hurt when you run or anything like that, this is an awesome alternative that doesn't cause the pressure on your joints like running does!
