I think you can drink a small amount of coke zero and fiber sprite when you exercise. Because these two kinds of drinks are sugar-free, they are just sugar substitutes we often say. In other words, these two drinks do not contain calories, so they will not affect our fitness effect. But it is better to drink less.

Because these two drinks do not contain sugar, but there are still pigment additives or other additives. Moreover, both of these drinks are carbonated drinks, which are not recommended because they are carbonated drinks. Because the carbon dioxide contained in it can play the role of sterilization and bacteriostasis in drinks, it brings us a very exciting taste, but it also brings some problems to our digestive system.

For example, when we quote it before and after strenuous exercise, it is easy to cause flatulence, which in turn leads to abdominal pain. Moreover, we will produce a lot of acidic substances during exercise, while coke zero and fiber sprite containing phosphoric acid will aggravate the fatigue of the body to a certain extent, destroy the acid-base balance of the body, and make it more difficult to recover from fatigue.

Therefore, in the process of fitness, we should try to drink these carbonated drinks as little as possible. Although they can bring us a refreshing and exciting taste to a certain extent, electrolyte drinks that can replenish electrolytes lost during fitness are a more reasonable choice. It can help you reduce fatigue, and it won't have any influence on your fitness effect, so electrolyte drink is the best drink for fitness people.

The above is my personal view on this problem, I hope I can help you, thank you.