One of the most fascinating aspects of being a female athlete is that your body is constantly changing. Hormones influence far more than reproductive health. They affect energy levels, recovery, strength, coordination, and even injury risk. Understanding how estrogen and progesterone fluctuate throughout the menstrual cycle can help women work with their bodies instead of feeling frustrated when workouts suddenly feel harder or easier from one week to the next.
During the first half of the menstrual cycle, known as the follicular phase, estrogen gradually rises while progesterone remains low. Many women report feeling stronger, more energetic, and more resilient during this time. Research suggests higher estrogen levels may support muscle repair, carbohydrate storage, and exercise performance. As ovulation approaches, some women notice they can handle higher-intensity workouts particularly well. However, because estrogen can also increase ligament laxity, some studies suggest there may be a slightly higher risk of certain injuries, such as ACL tears, around ovulation. This doesn’t mean you should avoid training, but it does highlight the importance of strength training, proper movement mechanics, and paying attention to how your body feels.
After ovulation, the luteal phase begins and progesterone rises. Many women experience increased fatigue, higher perceived effort during exercise, and slower recovery. Body temperature naturally increases during this phase, which can make workouts feel more challenging, especially in warm weather. Some women also notice changes in sleep quality, mood, or hydration needs. In this phase it may be helpful to allow for a little more flexibility, prioritize recovery, and recognize that a workout feeling harder isn’t necessarily a sign that fitness is declining.
Tracking your cycle can provide valuable insights into your training. While every woman responds differently, understanding where you are in your cycle can help explain fluctuations in performance, recovery, and energy levels. It can also help you plan challenging workouts during times when you feel your strongest and build in additional recovery when your body may need it. The goal isn’t to train less. It’s to train smarter and more intentionally.
Hormonal changes continue throughout life, and many women notice significant shifts during perimenopause and menopause. As estrogen levels decline, maintaining muscle mass becomes more challenging, recovery may take longer, and bone density naturally decreases. These changes can affect strength, power, and overall athletic performance, but they are not a reason to stop pursuing fitness goals. In fact, regular exercise becomes even more important during this stage of life. Strength training helps preserve lean muscle mass and bone health, while cardiovascular exercise supports heart health, energy levels, and overall well-being.
The good news is that women can continue to build strength, improve fitness, and achieve incredible athletic accomplishments at every age. Understanding how hormones influence your body simply provides another tool to support your training. Whether you’re navigating monthly cycle fluctuations, perimenopause or menopause, listening to your body, prioritizing recovery, and maintaining a consistent strength and running routine can help you stay healthy, strong, and confident for years to come.
Sources
- American College of Sports Medicine Position statements on exercise and female physiology.
- North American Menopause Society Guidance on menopause, exercise, bone health, and muscle preservation.
- National Institutes of Health Research on menstrual cycle physiology, exercise performance, and menopause-related changes.
- McNulty KL, et al. “The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women: A Systematic Review and Meta-analysis.” Sports Medicine, 2020.
- Elliott-Sale KJ, et al. “Methodological Considerations for Studies in Sport and Exercise Science with Women as Participants.” Sports Medicine, 2021.