[Aequitas]

Here some information that we have been given to pass on:

A quick way to find the amount of calories needed to either lose/gain weight is this:

Take the target weight you want to reach and multiply by 15. That will give you an estimated amount of calories to eat each day.

To find your recommended ideal weight for your height follow this:

Men: 106lbs for first 5' + 6lb/inch > 5' Ex. 5'10" = 106 + 60 = 160lbs

Women: 100lbs for first 5' + 5lb/inch > 5' Ex. 5'6" = 100 +30 = 130lbs

This rule of thumb also allows a +/- 10% buffer.

As far as fluid replacements...your son is obviously exercising and working in a hot arid environment at a restless pace. He can end up losing 1-2 liters of water each hour of exercise. He will need water + carbs to stay properly hydrated. TR's suggestions follow the guidance we were given.

Things also to consider for his diet would be keeping him aware of when he eats. After strenuous activities it's important for the body to get carbs within at least 2 hrs. to replace the depleted glycogen stores. Things like powerade, protein bars, yogurt, and chocolate milk would all be ideal. Protein is also important and you can recommend .8gm/kg/day.

Hope this helps...I'll continue to look around for some more information I have filed away.