Actual studies of athletes have found that there is very little loss of electrolytes from sweating and that there was no need to replace them. One does need to have adequate water intake and one can gauge that for themselves by checking the color or lack thereof in their urine.

Companies like Gatorage and Coke made millions in profits by selling water with a few additives and marketing it as having "special" properties. Snake oil is something people will buy without any critcall thinking or taking time to investigate the claims being made.

Sugar results in a spike in the blood sugar level followed by a big drop, often referred to as bonking. Better to eat dried fruit that has fiber which slows the sugar spike in the blood or even better is pre-loading with carbs. This is not really rocket science and these recommendations have been made for many decades by scientists, though contrary to the hype from marketing departments.