How can anyone seriously claim that Zone 2 training is the most effective way to improve the bodys ability to metabolize carbohydrates and fat when the science is still unclear on the optimal intensity and duration for achieving this goal? What is the actual physiological mechanism by which Zone 2 training supposedly enhances the bodys ability to switch between carbohydrate and fat metabolism, and how does this process differ from other intensity zones?
Is it not possible that the benefits of Zone 2 training on carbohydrate and fat metabolism are overstated and that other factors, such as diet, sleep, and recovery, play a much more significant role in determining an individuals metabolic efficiency? What evidence is there to suggest that Zone 2 training is superior to other forms of exercise, such as high-intensity interval training or strength training, in terms of its effects on carbohydrate and fat metabolism?
Furthermore, how do the effects of Zone 2 training on carbohydrate and fat metabolism vary across different populations, such as endurance athletes, strength athletes, and sedentary individuals? Are there any individual differences in the response to Zone 2 training that need to be taken into account when designing a training program?
Can anyone provide a clear and concise explanation of how Zone 2 training affects the bodys ability to metabolize carbohydrates and fat, and what the practical implications of this are for athletes and coaches? Or is this just another example of a training fad that has been oversold and under-substantiated by the scientific community?