By definition, drinking water is considered a healthy activity because our bodies are made up of 70% or more water, so we desperately need it. But also because drinking other beverages, especially in larger quantities, can cause health problems. For example, many of our soft drinks contain a lot of sugar (sodas and alcoholic beverages) and/or have extremely low acidity (pH value), others contain far too large amounts of caffeine (the Energy drinks), which are held responsible for arrhythmias and even heart attacks. Young people in particular drink far too many of these health-threatening drinks.
At several schools and universities in the United States, the sale and consumption of the energy drinks (a can or bottle can contain up to 16 times more caffeine than the same amount of Cola, for example) has now been banned because the usually high consumption has led to fatal heart attacks among their students. Consideration is currently being given to either banning the drinks altogether or placing a legal cap on the caffeine content of the drinkl.
The water helps optimize the body's acid-base balance and supports proper functioning of a (healthy) immune system.
You feel fitter after a certain amount of time of drinking ionized alkaline water and you are more active and assertive as a result, simply because you have started to feel better and better.
It should be clear, however, that this water can only perform its health supporting function best if you also improve your lifestyle as a whole by doing more healthy things like eating healthy, drinking healthy or being more active, for example.