Your physiology changes as your hormones fluctuate, but there’s never a “bad day” to nail a personal best.
My life’s work is largely devoted to helping women work with their unique physiology to train and perform their best. That means adjusting training sessions to leverage how our bodies respond to stress according to the hormonal fluctuations of our menstrual cycle. But it’s important to bear in mind that this doesn't mean there’s a “bad time of month” for performance. You can crank out a PR at any phase of your cycle.
This is an important distinction, because sometimes people think that because I recommend tailoring training according to a female’s hormonal fluctuations that I’m also implying that performance itself will vary during the cycle. That’s not necessarily the case. Women can perform their best at every point in the menstrual cycle, because performance is different from training.
