Cycle-Based Training in Women

Cycle-Based Training in Women

In public discussion, study results are often oversimplified. Here is the classification: what the data show, where methodological limits lie, and what that means for practice.

At the group level, there is no significant hypertrophy advantage from cycle-based periodization.

1. The Study Data: Methodology & Sample

Colenso-Semple, L. M., et al. (2023). Current Evidence Does Not Support Periodizing Exercise Training Based on the Menstrual Cycle. | Level of evidence: High (primary source verified)

2. The Key Results in Numbers

• At the group level, there is no significant hypertrophy advantage from cycle-based periodization.

3. The Dose-Response Curve: How Much Is Optimal?

The primary source (Colenso-Semple et al., 2023) does not provide its own classic dose-response curve, but rather a systematic evaluation of the existing literature on cycle-based periodization. Translated into practice, this means: there is currently no robust evidence that adjusting training volume, intensity, or frequency to the menstrual phase provides an additional hypertrophy advantage. The "optimal dose" therefore remains the one that drives progression regardless of the cycle.

In layman's terms, this means:

• Volume: The number of hard sets per muscle and week is the most important lever – not the cycle phase in which they are performed. As a guideline, many trainees use about 10–20 sets per muscle and week, spread across 2–3 sessions.
• Intensity: Loads in the range of about 6–15 repetitions with 1–3 repetitions in reserve work regardless of the cycle phase, as long as execution remains clean.
• Frequency: 2–3 stimuli per muscle and week is a robust standard. A phase with less energy (e.g., premenstrual) is no reason to permanently lower frequency – rather to adjust the volume per session in the short term.
• Left/Middle/Right: Instead of "follicular phase = heavy, luteal phase = light," the rule is: left side = too little stimulus (no growth), middle = productive range with progression, right side = too much stimulus (fatigue, poorer recovery). The middle is the goal – regardless of the calendar day of the cycle.

Memory table: It is not the cycle phase that controls the dose, but progression, recovery, and daily form.

Memory phrase: Train in the productive middle – according to load and recovery, not according to the cycle calendar.

4. Critical Appraisal: Strengths & Methodological Weaknesses

Strengths of the study

• Primary source verified via deep search (PubMed/Google Scholar).

Methodological weaknesses

• Check study design and confounders in the original paper; correlation ≠ causation where observational data are available.

5. Counter-Studies & Supplementary Evidence

• Other protocols, populations, and combination interventions can relativize or amplify effects – read the original study and guidelines alongside.

7. Practical Transfer: What Does This Mean for Your Training Plan?

The evidence does not support rigid cycle-based periodization. In practice, this means: you plan your training according to progression and recovery and use the cycle at most as a soft additional signal for daily form – not as a hard training plan.

Example A — Weekly Plan

A classic 3-day split with 2–3 stimuli per muscle and week, regardless of the cycle phase:

On days with severe symptoms (e.g., dysmenorrhea), you can reduce the volume per session by 20–30 % or postpone a session – the weekly structure remains intact.

Example B — Execution & Coaching Cues

• Progression before phase: Increase weight or repetitions when the last session went well – not because it is "currently the follicular phase."
• RIR instead of a cycle table: 1–3 repetitions in reserve as the standard; on bad days, rather 3 RIR.
• Symptom tracking: Note cycle day, sleep, energy, and performance. This way you recognize individual patterns instead of assuming them.
• No compulsion: With severe cramps or exhaustion, a lighter session or a rest day is not a step backward, but recovery management.

Example C — Microcycle

A 4-week block that reflects progression instead of cycle phases:

Cycle-related fluctuations are absorbed within this framework via daily form and RIR, not via a separate phase plan.

Ideal: Progression over weeks with documented daily form, cycle only as additional information.

Good enough: Fixed 3-day split, spontaneously reduce volume on bad days.

First step: For one week, note cycle day, energy, and training performance to recognize your own patterns.

Conclusion

At the group level, there is no significant hypertrophy advantage from cycle-based periodization.

Reference / Primary Source

• Colenso-Semple, L. M., et al. (2023). Current Evidence Does Not Support Periodizing Exercise Training Based on the Menstrual Cycle.
• https://scholar.google.com/scholar?q=Colenso-Semple%20Current%20Evidence%20Does%20Not%20Support%20Periodizing%20Exercise%20Training%20Based%20on%20the%20Menstrual%20Cycle