03/23/2026
Men’s hormones tend to follow a daily (circadian) rhythm, with key hormones like testosterone rising in the morning and tapering off by evening. This creates a relatively stable, repeatable pattern that supports consistent energy, strength, and recovery day to day. Because of this predictability, most training programs and work schedules have historically been designed around a steady output model—assuming similar performance capacity every day.
In contrast, women’s hormones fluctuate across the menstrual cycle (about 28 days), with shifting levels of estrogen and progesterone influencing energy, metabolism, mood, and physical performance. There are phases where strength, endurance, and recovery are naturally higher, and others where the body needs more rest and support. When these natural variations are ignored and women are expected to maintain constant intensity, it can contribute to fatigue, reduced performance, and a greater sense of burnout.