Originally Posted by JimiMimni

However, you replenish your phosphate stores by supplementing with glucose, to keep your glycogen topped off. If your body has full glycogen stores, it is more likely, and able, to secrete creatine and phosphates.

Strength/power athletes live and die by their CHO availability. One of my old professors loved to tell the story of one of his bobsleigh athletes who went on a low-carb diet, and showed a 10% drop in rate of force development when she was tested a week later. In actuality, your caloric needs can be quite high for sprint sessions, even with low volume workloads. Granted, part of that is also being a sprinter, which in general means you're a large, muscular individual, which means you have a higher-than-average resting metabolism. You're also burning calories in recovery from efforts in addition to the actual work you're doing.

Remember, your sessions are more than a single bout of phosphate activity. The nutrition specialists I went to grad school with always made the argument that breakfast was not the most important meal of the day, the workout window was. They were referring to the meal prior, the calories consumed during training, and the (usually) two meals consumed post training. Those meals can determine how well, in part, your training session goes, and strongly influence the next training session as well.