Also to note that some female athletes have started to try to get their big events to happen follicular phase of their cycle. During this time they are stronger, faster and better than other parts of their cycles. Its all based on their hormone. I was chatting with some crazy distance runners who were trying to only schedule their big marathons / ultra marathons during their follicular phase only. They also try to get their distance runs and recovery days synced with their cycles. You really need an app for that.