Metabolic Stress Testing Reveals Persistent Lipid‐Handling Dysfunction in Women With Polycystic Ovary Syndrome Despite Exercise Training
Authors' conclusion
Metabolic defects in PCOS are stress-dependent and not detectable at rest. Exercise training improves resting metabolism but reveals persistent impairment in adaptive lipid handling during combined insulin and lipid challenges, suggesting impaired coordination of substrate supply during metabolic stress.
Study context
- Population
- Women with polycystic ovary syndrome (PCOS) and controls undergoing clamps with saline or lipid infusion before and after 8 weeks of supervised exercise; plasma metabolomics (163 metabolites)
- Participants
- 12 vs 10
- Comparison
- Women with PCOS vs controls
- PCOSn = 12
- Controlsn = 10reference
- Outcome
- Plasma metabolite trajectories (Group × Timepoint × Intervention)
Methodological detailshyperinsulinaemic-euglycaemic clamps, randomised saline or lipid infusion, before and after 8 weeks of supervised exercise
- Hyperinsulinaemic-euglycaemic clamps
- Randomised saline or lipid infusion
- Before and after 8 weeks of supervised exercise
Main finding
As reported in the abstract
- Three-way interaction (condition-dependent trajectory divergence)
- p = 0.008
- Post hoc: divergence during post-exercise lipid challenge
- p = 0.048
- PCOS: reduced suppression of ether-linked phosphatidylcholines during insulin-stimulated lipid loading (PC ae C44:4)
- p = 0.031
Further findings
Exploratory metabolite ratios
- Suggested impaired substrate coordination under stress
- Exploratory
Original publication
Metabolic Stress Testing Reveals Persistent Lipid‐Handling Dysfunction in Women With Polycystic Ovary Syndrome Despite Exercise Training. Diabetes Obes Metab. Published 3 August 2026. doi:10.
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