I'm 17, 150, 5'11" and I really don't know my body weight. I'm a runner so I'm sure it's kinda low. My routine right now is Monday chest and arms, Tuesday back and legs, Wednesday off, Thursday arms and chest, Friday off, Saturday back and legs, Sunday off. I run 40's everyday so I guess that counts as cardio. Is this a good routine or should I be doing something different? Oh yeah I usually do abs when I do my legs and back. I know it's gonna take time, I just a need a good diet to get me going.