I don't deprive myself of food, I'm not muslim but from what I know muslims do eat meat, I'm jain, though not a very strict one because I eat eggs and dairy products. In my eyes I don't think I'm depriving myself of food. I'm proportionally fine, sure I'm a bit short for my age and a bit light for my height, but not everybody is perfect, I know people my age and my height who are overweight. in the summer hols the only real excercise I do is a lot of walking, footie and cricket in the garden and weight training every now and again with very light dumbells. at school though I do lots of excercise, gym 2 or three times a week + rugby football cricket etc, + on average at school due to the siting of the buildings, we walk a few kilometres each day anyway... sorry to wind on![]()
Actually, you're very light for your height, sex and age. Not "a bit light". It may be OK for you, perhaps, as it appears that you are capable of an active life, but you are startlingly light even if your height is taken into account. Nearly everyone of your age and height is heavier than you.
Here is a growth chart showing percentiles for age, height and weight for male people between the ages of 2 and 20 years in the USA.
http://www.cdc.gov/nchs/data/nhanes/growthcharts/set1clinical/cj41l021.pdf
You're outside the range entirely for both height and weight. The bottom lines (one for height, one for weight) are the lowest 5% of people line. You're well below both of them.
This might be acceptable for you. Some people are naturally short. Some people are naturally skinny. Some people grow into their adult size later than others.
Do you know how tall your genetic parents are? That tends to provide a rule of thumb for your own height - people tend to be roughly midway in height between their genetic parents, within a few inches either way. Maybe your parents are short and slightly built, I don't know.
But you are far from the average and it might be a good idea to get some expert medical advice.