PMS & PMDD: Why the week before your period feels so different.
6 sections, about 10 minutes in total
9 in 10
9 in 10 women report some premenstrual symptoms (OWH).
~2 wks
The luteal phase lasts about two weeks, and that is when most symptoms happen.
1 in 20
Roughly 1 in 20 women meet criteria for PMDD, the severe form (IAPMD).
Start with the signs
The signs of PMS.
These show up in the week or two before your period. Seeing the pattern is the first step to planning around it. Tap the signs you have to see why they happen.
Nothing you tap is stored. This is a mirror for you, not a form for us.
How to tell them apart
Where PMS ends and PMDD begins.
Compare the two side by side. They are often blurred together, and that confusion can delay diagnosis for years.
PMS is common and manageable
- Symptoms in the 1–2 weeks before your period that ease within days of bleeding starting
- Uncomfortable and real, but life, work and relationships keep functioning
- Responds meaningfully to sleep, steady meals, training and stress care, which are the habits covered below
PMDD is severe and diagnosable
- A recognized medical condition (in the DSM-5) affecting roughly 1 in 20 women
- Mood symptoms (rage, despair, anxiety) severe enough to genuinely disrupt work, relationships or safety, cycle after cycle
- Deserves a doctor, because effective, evidence-based treatments exist. Coaching supports alongside them, never instead of them
Track your symptoms every day for two cycles. That record shows whether the pattern is PMS or PMDD. If your low weeks include hopelessness or thoughts of harming yourself, get support now, before any habit work.
What the evidence says
What the evidence says about PMS and PMDD.
PMS comes from the hormone drop in the days before your period. It is real and it arrives on a schedule. Regular exercise helps. PMDD is a more severe form and needs proper treatment. Supplements have weak evidence.
These summaries reflect the cited research and will change if the research changes.
The four phases explained
What each phase of the cycle does.
Tap each phase of the wheel to see what the hormones are doing, how it can feel, and how training and food can work with it.
- The hormones
- Estrogen climbs steadily as an egg matures, and many women find training feels easiest in this stretch.
- How it can feel
- Many women notice their best mood, energy and training weeks of the month here.
- How fitness and lifestyle help
- This is a good phase to push progress with heavier lifts, harder sessions and new habits, because energy and motivation are usually higher.
A 28-day wheel is the textbook diagram. Phase lengths vary from woman to woman and cycle to cycle, so your own tracked pattern matters more than the diagram. Wheel colors are chosen for readability (CVD-checked) and do not signal importance.
Plot your own cycle
Find your PMS week on the calendar.
Enter your average cycle length. The calendar marks the week before your period, which is when most PMS symptoms show up. Once you know the dates, you can plan your training, food and sleep around them.
Your average cycle length
The highlighted week is the late-luteal window, meaning the days after ovulation when the hormone fall lands and most PMS symptoms cluster. It is an estimate based on average luteal-phase length. Two or three tracked cycles will show your real pattern, which is more reliable than any calculator.
This is an estimate for planning, not a diagnosis.
Now the part you control
What eases PMS and PMDD.
These habits do not stop PMS. They make the luteal weeks easier. The luteal weeks are the two weeks between ovulation and your period, when symptoms build. Start with tracking, because the other habits work better once you know your own pattern. Tap a habit to see what to do.
Tap a tab to open it. The detail lands here.
Supplements sometimes discussed for PMS, like calcium, are not something we prescribe, and that includes over-the-counter products.