Exercise is one of the most effective lifestyle interventions for PCOS — but misinformation about what type of exercise is best (and fears about cortisol) has created confusion.

What the evidence says:

Resistance training (strength training): • Improves insulin sensitivity more effectively than cardio alone • Increases lean muscle mass (which improves metabolic rate) • Reduces androgens • Improves body composition even without weight loss • 2-3 sessions per week shows benefits in studies

Cardiovascular exercise: • Moderate-intensity (brisk walking, cycling, swimming) improves insulin sensitivity • 150 minutes per week is the standard recommendation • Combines well with resistance training

Yoga: • Multiple PCOS-specific studies show improvements in testosterone, insulin resistance, and anxiety • Benefits beyond pure physical exercise (stress reduction)

The cortisol myth: "Exercise spikes cortisol and worsens PCOS" has gone viral on social media. This is misinformation. While intense exercise does temporarily elevate cortisol, regular moderate exercise LOWERS baseline cortisol over time and dramatically improves insulin sensitivity. The temporary cortisol spike from exercise is a normal, healthy response — not something to fear.

The most important exercise principle: ANY movement you enjoy and will do consistently is the best exercise. Walking counts. Dancing counts. Playing with your kids counts. The research consistently shows that the biggest benefit comes from moving from sedentary to moderately active — not from any specific protocol.

Rest matters too. Recovery is part of the process, especially if fatigue is a major symptom.