Agreed, there's also variances in body fat and muscle percentages to take into consideration. I'm 5'10" and when I was 210lb I had less fat than extra lean beef

Agreed, there's also variances in body fat and muscle percentages to take into consideration. I'm 5'10" and when I was 210lb I had less fat than extra lean beef. You, me or the girl can easily be overweight or underweight based on our body fat percentage, which can have a considerable effect on drug absorbency. To be honest, I've worked outside since I was 17 and I still frequently don't get enough sleep. No matter what you do, I think teenagers are always going to be lacking in sleep because on average they need more like 10 hours sleep not 8, and the world isn't set up for that.