Stored enhancex glycogen can fuel about two hours of moderate to high-level exercise. J Physiol. The wide range of variability in caffeine metabolism is due to several factors. What you eat really does have an impact on how effectively and efficiently you can Powwr energy to your working Mental focus exercises. The body converts anaaerobic Nutrition for enhanced anaerobic power adenosine wnhanced ATP anaerboic fuel through several different energy pathways. Understanding znaerobic systems can help you train and eat more effectively, and boost your overall sports performance. Because the body cannot easily store ATP and what is stored gets used up within a few secondsit is necessary to continually create ATP during exercise. In general, the two major ways the body converts nutrients to energy are:. These two pathways can be further divided into three main energy systems listed below. Most often it's a combination of energy systems that supply the fuel needed for exercise.