If one is working in the heat and loosing minerals, those minerals need to be replaced. More water ain't gonna replace those minerals. One of the key minerals is potassium. If you don't have enough potassium you will be in a world of hurt. Years ago I was standing in the sun and heat wearing a uniform. After 5-6 hours I was loosing it even though I was drinking lots of water. I took a break to get something to eat and found a banana. Eating that banana was like flicking the on switch. I was back to normal ASAP. Banana's are high in potassium as are must nuts and some fruits. When working out in the heat I eat lots of nuts, fruits, or energy bars that are high in minerals.
If you don't have enough potassium, you can get muscle cramps. For me that means the cramps are in the legs. I have not had cramps in years since I made sure I was eating plenty of food with potassium.
Sports drinks make me sick so I don't drink them. Too much water seems to unbalance my system as well so I have to eat and drink water.
Way back in 2000, we had a TBNer Doctor who had some posts in a discussion about heat stroke.
http://www.tractorbynet.com/forums/rural-living/1384-heat-stroke-isnt-cool-2.html. He posted a recipe for a sports drink at post number 19 in the thread.
Dr. RCH, went out to say in post number 25,
I printed out these two posts years ago and keep the recipe wrapped around a container of Morton's Lite Salt. :laughing::laughing::laughing: I don't use the syrup as he mentioned in the latter post because I surely do not need the extra calories and I think the huge amount of sugar in sports drinks is what makes me sick.
The OP's coworker may have other health issues but RCH's recipe sure is CHEAP compared to sports drinks and it can be adjusted to one's taste. I bought the Morton Lite salt over 7 years ago and I have many years left of use in that container.
Later,
Dan