You wake up feeling amazing. A week later you wake up and can barely get moving. You slept well, ate well, did nothing out of the ordinary. Yet there's a clear difference.
The explanation lies in your hormones.
The connection between hormones and energy in women is stronger than most people realize. Every month women go through a hormonal cycle that directly affects their energy, mood, focus and motivation. Once you understand this, you no longer have to just endure your energy dips. You can anticipate them, work with them and use them.
The key hormones and their effect on energy
Estrogen: the energy and motivation hormone
Estrogen rises in the first half of your cycle (follicular and ovulation phases). It has a direct positive effect on serotonin, dopamine and norepinephrine, the hormones that make you feel happy, motivated and energetic.
When estrogen is high, you have more energy, you're more creative and you communicate more easily. Many women describe this as their "best week of the month".
Progesterone: the calming hormone
Progesterone rises in the luteal phase (after ovulation). It has a calming effect, but can also cause fatigue. It promotes sleep, but can also intensify irritability and mood swings as estrogen drops at the same time.
This is why PMS symptoms are most common in the luteal phase. The hormone balance shifts, and women feel that directly in their energy and mood.
Testosterone: energy and drive
Women produce testosterone too, albeit in smaller amounts. It peaks around ovulation and contributes to energy, drive, libido and confidence.
If you suddenly feel more confident and energetic around day 14 of your cycle, testosterone is likely involved.
Menstrual phase: all hormones low
During menstruation, both estrogen and progesterone are at their lowest. This explains low energy during your period. Combined with blood loss (and potentially iron loss), your body is literally asking for recovery.
This isn't weakness. This is your body functioning optimally. Rest in this phase isn't wasted time, it's an investment in the rest of your cycle.
Hormonal symptoms in women: when does it become a problem?
Mild energy variations per phase are normal. But if your symptoms are severe, or if you feel tired and exhausted throughout your entire cycle, there could be more going on.
Common hormonal symptoms in women linked to energy fluctuations:
- Severe fatigue in the luteal phase (PMDD or hormonal fluctuations)
- Chronic fatigue regardless of phase (thyroid, adrenal or other causes)
- Extreme mood swings that interfere with daily functioning
- Irregular cycles that make your energy pattern unpredictable
If symptoms persist, it's always wise to consult a doctor. CycleGlow is not a medical device, but it does help you recognize your patterns and discuss them with a professional.
Tracking hormones and energy with CycleGlow
Tracking your energy in relation to your cycle gives you valuable insights. You see when you feel good and when you don't. You recognize the patterns. And you learn to plan ahead instead of being caught off guard.
CycleGlow lets you log your energy, mood and cycle every day in two taps. After a few weeks you'll see your personal hormonal pattern. Then the real planning begins.
Frequently asked questions
Which hormone gives women energy?
Estrogen is the hormone that contributes most to energy, motivation and a positive mood. It rises during the follicular and ovulation phases. Testosterone (produced in small amounts by women) also contributes to energy and drive.
Why do I have low energy during my period?
During the menstrual phase, estrogen and progesterone are at their lowest. This results in lower energy, sometimes intensified by blood loss. Your body is asking for rest and recovery in this phase. That's completely normal and biologically explainable.
How can I manage my energy as a woman?
Start by tracking your energy daily for a few weeks. You'll learn your personal pattern and can align your schedule with your energy levels. An app like CycleGlow helps you put this into practice.
Are mood swings caused by the cycle normal?
Yes. Mood swings are a direct result of hormonal fluctuations, especially in the luteal phase. If the mood swings are severe or interfere with your daily life, it's wise to consult a doctor.