Gatorade will help him for keeping the electrolyte balance, but water is also important to keep the muscles hydrated, provide oxygen to the muscles, etc...
I would like to know if it is good or bad to only drink sports drinks during maximum efforts, or should I have one bottle of sports drink and one bottle of water. I am reading from your quote, that each drink has different affects. Maybe I have misunderstood.
I have already started to drink more, by keeping an eye on my watch and taking a good gulp every 5 minutes.
Thankyou.
Mark