5 Key Takeaways

• 1

  Menstrual cycle phase does not influence muscle protein synthesis or myofibrillar protein breakdown in response to resistance exercise.

• 2

  The study involved 12 premenopausal women assessed during the late follicular and mid-luteal phases using a crossover design.

• 3

  Muscle biopsies and deuterium oxide tracing confirmed that menstrual cycle phase had no effect on resting or exercise-stimulated muscle protein synthesis.

• 4

  The findings suggest that premenopausal women should not be excluded from exercise science studies based on hormonal status.

• 5

  The study adds to literature questioning the impact of ovarian hormone fluctuations on exercise-induced muscle adaptation.