I know it is said that sweat is not tied to calorie burn....that i think is only a half truth.
Its simple....given the same conditions (same excercise ,same person,same hydration, same temp and humidity ) that person will sweat more at an increased excercise intensity than at a lower one. So ya sweating is correlated with energy expenditure (calories burned). Of course if one of the other conditions (ambient temp , hydration etc) changes then the sweat rate may not be correlated with calories burned. I know
this from personal experience too. The harder i work the more i sweat in almost all cases. So who else thinks these kind of claims are half truths?