Endurance sports like running and triathlons demand exceptional physical and mental resilience. But for women, there’s an additional layer to performance and wellbeing that often goes overlooked: hormonal health. As a pelvic health physiotherapist, I frequently see active women who are doing “everything right” with their training—yet struggling with fatigue, injuries, pelvic floor symptoms, or disrupted menstrual cycles. Often, the missing piece is understanding how endurance training interacts with the body’s hormonal system.
The Hormonal System: More Than Just Periods
Hormones regulate everything from energy levels and metabolism to bone density, recovery, mood, and pelvic floor function.
Oestrogen – supports bone health, muscle repair, and tissue elasticity (including the pelvic floor)
Progesterone – influences temperature regulation, breathing, and recovery
Cortisol – the stress hormone, elevated with intense or prolonged training
Leptin & insulin – regulate energy availability and metabolic function
When training load, nutrition, and recovery are well balanced, these systems work in harmony. When they’re not, disruption can occur.
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