Adjusting Training Around the Menstrual Cycle for Female Triathletes: Optimizing Workouts by Physiological Phase

Introduction

The menstrual cycle of female triathletes significantly affects training performance, recovery speed, and nutrition needs. Understanding the 4 phases of the cycle and adjusting training accordingly can prevent the frustration of “working hard but seeing performance decline.” This article compiles scientifically-based adjustment methods.

I. The 4 Phases of the Menstrual Cycle

Using a 28-day cycle as an example:

II. Training Recommendations by Phase

Menstrual Phase (Days 1-5):

• Maintain light aerobic work (mainly Z2)
• Avoid high-intensity intervals
• Prioritize iron supplementation
• Restorative yoga can help

Follicular Phase (Days 6-14):

• Schedule the highest-intensity workouts
• FTP testing and PR attempts are suitable for this phase
• Heavy strength training yields the best results

Ovulation Phase (Days 13-15):

• Ligaments are looser and injury risk is higher; extend warm-up
• Avoid high-impact jumping exercises

Luteal Phase (Days 16-28):

• Body temperature rises 0.3-0.5°C; double hydration
• Fatigue is more likely; reduce training volume by 10-15%
• Premenstrual syndrome (PMS) affects mental state; consider switching to technique-focused training

III. Key Nutritional Focus

Adjust by phase:

• Menstrual Phase: Iron (red meat, spinach), Vitamin C
• Follicular Phase: High protein (recovery + strength)
• Ovulation Phase: Antioxidants (berries, turmeric)
• Luteal Phase: Magnesium (nuts, bananas) to ease mood

IV. Managing Race Day During Menstruation

If race day falls during the menstrual phase:

• Use a menstrual cup or tampon (more suitable for sports than pads)
• Reduce high-fiber foods 1-2 days before the race to avoid bloating
• Carry spare supplies (place them in the transition area)
• Supplement iron and electrolytes
• Don’t give up due to emotional factors; most athletes can still finish normally

V. Long-Term Cycle Tracking

Recommended tools:

• Tracking apps (Flo, Clue, Garmin Connect)
• Track at least 3-6 cycles to establish a pattern
• Cross-reference training RPE with the cycle
• Consult a gynecologist if cycles are irregular

Practical Advice

• Align a 16-week training plan with the menstrual cycle
• Don’t be afraid to discuss this topic with your coach
• Athletes taking birth control pills have more stable cycles, but performance may be affected
• Fulong races are in May-July, Kenting in March; estimate your cycle in advance
• If severe menstrual pain affects training, seek medical attention early

Conclusion

The menstrual cycle is a female athlete’s “natural training curve.” Working with it rather than against it can lead to better results. Start tracking for 3 months and gradually build your own personalized adjustment model.

Related Reading

• Sprint Female Athlete Training Adjustments: Menstrual Cycle and Equipment
• Training Adjustments for Female Cyclists During the Menstrual Cycle: A 4-Phase Power Workout Configuration Guide
• Training Differences for Female Cyclists: How Hormonal Cycles Affect Athletic Performance
• Menstrual Cycle and Training Periodization: A Scientific Training Guide for Female Athletes