Your hormones do not stay the same throughout the month, and your body’s response to exercise shifts with them. Oestrogen, progesterone, and testosterone all fluctuate across the menstrual cycle, influencing energy levels, strength, recovery, body temperature, and even motivation. Working with these rhythms rather than ignoring them can help you train more effectively and feel better doing it.
A systematic review and meta-analysis in Sports Medicine examined 78 studies and found that exercise performance may be trivially reduced during the early follicular phase (menstruation) compared to other phases. While the effect was small and individual variation was large, the findings support a personalised approach to exercise menstrual cycle phases planning rather than rigid rules.
The Four Phases of Your Menstrual Cycle
Before tailoring your training, it helps to know what is happening hormonally in each phase. A typical cycle lasts 28 days, though anywhere from 21 to 35 days is considered normal. The four phases create distinctly different hormonal environments that your body responds to in predictable ways.
Phase 1: Menstruation (Days 1 to 5)
What Is Happening Hormonally
Both oestrogen and progesterone are at their lowest. Prostaglandins trigger uterine contractions (cramps), and many women experience fatigue, bloating, and lower back pain. Energy levels tend to dip, particularly in the first two days.
How to Exercise
Gentle movement is your friend during menstruation. Walking, yoga, Pilates, light swimming, and stretching promote blood circulation, encourage endorphin release, and can actually reduce cramp severity without placing excessive demands on a body that is already working hard internally. If you feel strong enough for your usual workout, there is no medical reason to avoid it. The key is to listen to your body rather than forcing a high-intensity session on a day when rest would serve you better. Period SOS Cream applied to the lower abdomen before a gentle session can help ease cramps and support comfort during movement.
Phase 2: Follicular Phase (Days 6 to 13)
What Is Happening Hormonally
Oestrogen rises steadily, peaking just before ovulation. Research in Sports Medicine has shown that anaerobic capacity and muscle strength may be greatest during this phase when oestrogen levels are high. Oestrogen supports muscle protein synthesis, enhances neuromuscular function, and promotes a more favourable energy metabolism for high-intensity effort. You are likely to feel more energised, motivated, and capable of pushing harder.
How to Exercise
This is an optimal window for challenging workouts. Heavy strength training, high-intensity interval training (HIIT), sprints, plyometrics, and learning new skills or techniques all align well with the follicular phase. Your body is primed for building muscle and improving performance, so progressive overload (gradually increasing weight or intensity) is well-placed here. Take advantage of the natural energy boost by scheduling your most demanding sessions during this phase of the exercise menstrual cycle phases approach.
Phase 3: Ovulation (Day 14, Approximately)
What Is Happening Hormonally
Oestrogen peaks and a brief testosterone spike occurs, both of which support peak strength and power output. Luteinising hormone surges to trigger the release of an egg. Energy and confidence tend to be at their highest around ovulation. However, the rise in oestrogen also increases ligament laxity, which means joints may be slightly less stable.
How to Exercise
Continue with high-intensity and strength-focused training, but pay extra attention to warm-ups and form. The increased ligament laxity around ovulation means your risk of joint injury (particularly knee injuries) may be marginally higher. Prioritise controlled movements, adequate warm-up sets, and proper footwear. Group classes, social sports, and competitive events often feel best during this phase when energy and motivation are naturally elevated.
Phase 4: Luteal Phase (Days 15 to 28)
What Is Happening Hormonally
Progesterone rises and dominates, while oestrogen drops before a secondary, smaller rise mid-luteal. Progesterone raises core body temperature by approximately 0.3 to 0.5°C, increases reliance on fat metabolism over carbohydrates, and has a sedative effect via GABA receptors. Many women notice PMS symptoms in the final week: bloating, mood changes, fatigue, cravings, and water retention.
How to Exercise
Moderate-intensity exercise is well suited to the luteal phase. Steady-state cardio (jogging, cycling, swimming at a comfortable pace), moderate strength training with slightly reduced loads, and mind-body practices like yoga or tai chi work well. The higher core temperature means you may overheat more easily during intense sessions, so stay well hydrated and consider training in cooler environments. The shift towards fat metabolism makes longer, lower-intensity sessions more efficient. If PMS symptoms are significant, prioritising movement that feels good rather than performance-driven training helps maintain consistency without adding stress.
Key Principles for Cycle-Based Training
Individual responses vary considerably. While the hormonal patterns described above are consistent, how strongly each woman responds to them differs based on genetics, fitness level, stress, sleep, and nutrition. Tracking your cycle alongside your training (using an app or journal) for two to three months will reveal your personal patterns far more accurately than any generic framework. The most important principle is consistency: exercising in some form throughout your entire cycle is more beneficial than training intensely for two weeks and skipping the rest. Visit Glow by Hormone University for more evidence-based resources on working with your hormones.
Frequently Asked Questions
Q1: Should I avoid exercise during my period?
No. Gentle to moderate exercise during menstruation can reduce cramp severity, improve mood, and boost energy. If you feel too fatigued for your usual routine, scaling back to walking, yoga, or stretching is perfectly appropriate. The goal is movement, not performance.
Q2: When am I strongest during my cycle?
Research suggests that strength and anaerobic capacity may be slightly higher during the late follicular phase and around ovulation, when oestrogen peaks. However, individual variation is significant, and some women feel equally strong throughout their cycle. Tracking your own performance is the best way to identify your personal strength windows.
Q3: Does the luteal phase affect exercise performance?
Progesterone dominance in the luteal phase raises core body temperature, shifts energy metabolism towards fat utilisation, and can reduce motivation. Some women notice slightly lower endurance and power output. Adjusting to moderate-intensity sessions and staying hydrated can help maintain training quality without overexerting.
Q4: Is cycle-syncing exercise scientifically proven?
The concept is grounded in real hormonal physiology, but the evidence for rigid cycle-phase training protocols is still evolving. A 2020 meta-analysis found only trivial performance differences between phases, with large individual variation. Cycle-syncing is best viewed as a flexible framework for listening to your body rather than a strict programme.
Q5: How do I start exercising according to my menstrual cycle phases?
Begin by tracking your cycle and noting how you feel during each phase for two to three months. Record your energy levels, strength, mood, and any symptoms. Patterns will emerge that allow you to schedule more demanding workouts when you feel strongest and lighter sessions when energy dips. Adjust gradually rather than overhauling your entire routine at once.
