Cycle syncing – adjusting your workouts based on different phases of your menstrual cycle – has gained momentum in recent years. You may have seen posts suggesting when to lift heavier, when to rest, or when to do cardio, depending on where you are in your cycle.
But is cycle syncing truly necessary for strength or performance? And what do healthcare professionals recommend?
At FX Physical Therapy, our pelvic health team takes an individualized, evidence-informed approach. Here’s what we want you to know.
What Is Cycle Syncing?
Cycle syncing generally refers to aligning lifestyle behaviors (including workouts) with the hormonal shifts across the menstrual cycle’s four phases:
- Menstrual Phase (Days 1–5) – Estrogen and progesterone are low. Some people report fatigue or cramping.
- Follicular Phase (Days 6–14) – Estrogen rises. Energy may feel higher. Often promoted as a good time to strength train or increase intensity.
- Ovulatory Phase (Around Day 14) – Estrogen peaks; luteinizing hormone surges. May correspond with peak energy or athletic performance.
- Luteal Phase (Days 15–28) – Progesterone increases. Some individuals feel sluggish or experience PMS symptoms. Lighter workouts are often recommended.
Source: Harvard Health Publishing (2023), “Understanding the Menstrual Cycle and Performance”
https://www.health.harvard.edu
This approach is popular, but the evidence is mixed.
What Does the Research Say?
A 2025 peer-reviewed study in Nature Scientific Reports concluded:
“Hormonal fluctuations during the menstrual cycle may have some impact on exercise performance, but these effects are generally trivial and highly individualized… There is no clear-cut advantage to planning exercise regimes around specific menstrual phases.”
Source: Sacher, D., et al. (2025). Effects of menstrual cycle phase on exercise performance. Nature Scientific Reports. https://www.nature.com/articles/s41598-025-87352-6
Similarly, a systematic review in Sports Medicine (2020) reported:
“Performance changes across the menstrual cycle are variable and inconsistent. While some individuals may report differences, the average effect is minimal.”
Source: McNulty, K.L., et al. (2020). The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women. Sports Medicine, 50(10): 1813–1827. https://doi.org/10.1007/s40279-020-01319-3
What We Recommend at FX Physical Therapy
Based on the available research, we do not recommend changing your entire strength training plan solely based on your menstrual cycle. Instead, we focus on:
- Listening to your body: Use tools like the Rate of Perceived Exertion (RPE) to guide intensity.
- Tracking patterns: If you notice consistent changes in how you feel at certain points in your cycle, it may be helpful to plan deload or recovery weeks accordingly.
- Training progressively: We often program 3–4 weeks of progressive overload followed by 1–2 weeks of lower effort, which supports recovery, regardless of menstrual timing.
Source: American College of Sports Medicine (ACSM), Guidelines for Exercise Testing and Prescription, 11th ed. (2021)
This approach ensures both physical performance and long-term sustainability.
What About Pelvic Health?
If you experience:
- Pelvic pressure or heaviness
- Menstrual-related cramping that limits exercise
- Urinary leakage during workouts
- Fluctuations in core or hip pain
These symptoms may signal underlying pelvic floor dysfunction, which can be influenced by hormonal changes across the cycle.
Pelvic floor physical therapy can help identify imbalances, build strength, and support pelvic wellness throughout all phases of your cycle.
Source: Journal of Women’s Health Physical Therapy (2022), “Hormonal Influence on the Pelvic Floor Across the Menstrual Cycle”
Final Takeaway
Cycle syncing can help with self-awareness, but it isn’t essential for effective training. More important is responding to your body, managing load intelligently, and addressing any pelvic symptoms that may arise.
At FX Physical Therapy, we support your strength journey with evidence-based care tailored to your unique cycle: not a one-size-fits-all calendar.
Ready to feel stronger, more in sync, and symptom-free?
Visit our pelvic health page to find a specialized provider near you, and book a 1 on 1 pelvic health physical therapy session with our team today!
