Training Differences for Female Cyclists: How the Hormonal Cycle Affects Athletic Performance

The Long-Overlooked Training of Female Athletes

Sports science research has long focused primarily on male subjects, causing many training recommendations to be not fully applicable to women. In recent years, more and more studies targeting female athletes have revealed the substantial impact of the menstrual cycle on training and performance.

The Basics of the Menstrual Cycle and Hormones

A typical 28-day menstrual cycle is divided into two main phases:

Follicular Phase (Days 1-14): The Golden Window for Training

Physiological characteristics:

• Elevated estrogen levels enhance glycogen metabolism efficiency
• Relatively lower body temperature
• Higher pain tolerance
• Best strength and power performance

Training recommendations:

• Schedule the highest-intensity sessions (VO2max, threshold intervals)
• Attempt personal power tests (FTP testing is most accurate)
• Perform maximal strength testing in weight training

Ovulation (Days 12-16)

• Estrogen reaches its peak
• Strength and power may be at their highest
• But ligament laxity increases, slightly higher risk of knee injury

Note: Knee ligaments are more lax during ovulation; pay special attention to knee alignment during high-intensity training.

Luteal Phase (Days 15-28): The Intensity Adjustment Period

Physiological characteristics:

• Progesterone rises, basal body temperature increases by 0.3-0.5°C
• Glycogen metabolism efficiency decreases, fat burning increases
• Heart rate is higher at the same intensity
• Slower recovery, more prone to fatigue
• Some women experience PMS symptoms (mood swings, headaches, bloating)

Training recommendations:

• Reduce the frequency of high-intensity sessions (but no need to avoid them entirely)
• Increase the proportion of Zone 2 aerobic training
• Extend recovery time
• Avoid FTP testing during this period

A Framework for Periodized Training Around the Cycle

Practical Tracking Tools

Menstrual cycle tracking apps:

• Clue (detailed tracking designed for athletes)
• Natural Cycles
• Apple Health built-in feature

What to record:

• Daily subjective feeling during training (scale of 1-10)
• Objective performance in power or speed
• Recovery quality (HRV, sleep)
• Symptoms (fatigue level, mood, pain)

After tracking consistently for 3 months, you will be able to see your own cycle patterns.

What If Race Day Falls in the Luteal Phase?

If an important race happens to fall in the luteal phase:

1. Accept reality: Performance may be slightly below your best, but the difference is usually within 3-5%
2. Fuel with carbs early: Fat burning is higher in the luteal phase, so you need more carbohydrate intake than usual
3. Watch hydration: Mild bloating may occur in the luteal phase, but there is no need to deliberately restrict fluids
4. Adjust heart rate zones: Heart rate is higher at the same power output in the luteal phase, so pace by power rather than heart rate

Important Reminders

These are general trends, and individual variation is large. Some women see no impact on performance during the luteal phase, while others are significantly affected. The best strategy is to track your own data and identify your personal cycle patterns.

It is recommended to consult with a female sports medicine physician or a coach experienced in training female athletes to develop a personalized training plan.

Related Reading

• Physiological Differences in Female Cyclists: The Impact of the Menstrual Cycle on Training Performance
• Special Health Considerations for Female Cyclists: Hormones, Bone Health, and Equipment
• Periodized Training for Female Cyclists: The Relationship Between Hormones and Performance
• Menstrual Cycle Training Adjustments for Female Cyclists: A 4-Phase Power Workout Configuration Guide