The Menstrual Cycle & Exercise: How to Train in Every Phase

For most of us, our period is a monthly reminder that our bodies run on a hormonal cycle. Those hormones have a huge influence on our mood (hello shark week), our energy levels, our hunger, our sleep quality and how we feel about ourselves.

So let's talk about how your menstrual cycle affects exercise, and how to train with your body rather than against it. This is what people mean by cycle syncing: matching your workouts to the phase of your cycle you are actually in.

This is especially useful if you enjoy training but find you have more energy or motivation at certain times of the month, which is completely normal. That said, we are all different, and every cycle is different too. Some months I feel great on my period and I am happy to lift heavy. Other months I could not be bribed into picking up a barbell. 🏋️‍♀️

I really cannot stress this enough: learn to listen to your body, learn your own cycle, and work with your energy levels rather than pushing through workouts when what you need is rest.

What is cycle syncing?

Cycle syncing simply means planning your training around the four phases of your menstrual cycle: menstruation (your period), the follicular phase, ovulation and the luteal phase (PMS week).

Each phase brings its own changes, from hormonal and energy shifts to physical and mental symptoms. Thanks to the rise and fall of estrogen and progesterone, you may notice real differences in your strength, your performance and how long you take to recover.

It is not a rulebook, and you do not need an app or a spreadsheet to do it. Think of it as a starting point that you adjust based on what you actually notice in your own body.

Phase 1: your period

How to train: low to moderate intensity.

The menstruation phase brings a dip in energy, and your performance may drop with it, so this is a good week to take the pressure off. Some of the best ways to stay active while on your period:

• Yoga. Practising yoga can help soothe period cramps. There are plenty of styles that will help you reach your goals, but during your period a passive, relaxing style is usually best.
• Pilates. Similar to yoga, Pilates is great for reducing pain and promoting relaxation, which is exactly what this phase asks for.
• Walking. There are many advantages to walking, but while menstruating it can be particularly good: improved circulation and feel-good endorphins that help with cramps. Getting outside for fresh air does your head as much good as your body.
• Rest. Curling up in a ball is a completely legitimate option, and some months it is the only appropriate level of exercise available. Listen to your body.

Phase 2: the follicular phase

How to train: intervals and strength training.

The days overlapping your period and leading up to ovulation are the follicular phase (roughly days 1 to 13 of an average cycle). Rising estrogen brings a surge in energy, so this is a good time for more energetic sessions. A few types of interval training worth trying:

• HIIT. Short bursts of high-intensity work followed by short periods of rest or lower-intensity movement.
• Tabata. If you want to up the spice, Tabata is a style of HIIT that runs 20 seconds of hard work and 10 seconds of rest for multiple rounds, which makes it brilliant for endurance.
• Interval running or cycling. Adding intervals to a run or a ride is one of the simplest ways to build endurance.

There is also evidence that estrogen supports muscle strength in women, which makes the follicular phase a great time to chase progress in the gym. If you are going to go for a personal best, this is the week to do it.

Phase 3: ovulation

How to train: high intensity and strength training.

During ovulation your energy is peaking, so this is the time to make the most of it. Ovulation tends to happen around the middle of your cycle (on average between days 13 and 15), and these are the days to get your sweat on.

• HIIT. As above, high-intensity sessions suit the days when you are feeling good and ready to work.
• Strength training. A great time to grab the heavier weights and feel like your strongest self.

Phase 4: the luteal phase

How to train: low to medium intensity and recovery.

The luteal phase runs from after ovulation until your next period. Estrogen drops off and your energy tends to go with it. Rising progesterone can raise your body temperature and bring fluid retention and bloating, so easing off the intensity and prioritising recovery is usually the kinder choice.

This phase suits low-impact cardio, gentle bodyweight training and yoga. It is also worth knowing that cravings often increase here, and adding more energy-rich food to your meals will genuinely help you through this period (pun intended). A few ideas:

• Bodyweight training. The beauty of bodyweight work is that you can take it at your own pace and meet your limits without overexerting yourself.
• Low-impact cardio. Swimming and cycling are both gentle on the body and easy to take at your own speed.
• Walking and yoga. Just like phase one, these are always good options when your energy is lower.

Your cycle at a glance

• Period: yoga, Pilates, walking, rest.
• Follicular: intervals, cardio, strength training, go for the personal best.
• Ovulation: your strongest week, HIIT and heavier lifting.
• Luteal: lower intensity, bodyweight work, low-impact cardio, recovery.

Cycle syncing your food, gently

Cycle syncing gets applied to eating as well as training, and the same honest caveat applies: the research is limited, so treat this as a way to be kinder to your body rather than another set of food rules. The useful version is simple. Keep your protein steady at every meal all month (25 to 40g per meal is the target I give clients), because that never changes with your hormones.

Where the phases genuinely show up is appetite. Many women get real cravings and a higher appetite in the luteal phase: planning for that, with more energy-rich meals and snacks you actually like, beats white-knuckling it and calling the inevitable result a failure. In the follicular weeks, when energy is higher and training is harder, carbohydrates around your sessions earn their place. None of this is a diet, and there are no banned foods here.

Questions, answered

What is cycle syncing?

Cycle syncing is planning your training and recovery around the four phases of your menstrual cycle: your period, the follicular phase, ovulation and the luteal phase. The idea is to train harder in the weeks when your energy is naturally higher, and to prioritise gentler movement and recovery when it dips.

Should I exercise during my period?

Yes, if you feel up to it. Gentle movement such as yoga, Pilates and walking can ease cramps and lift your mood, and there is no need to avoid training altogether. Keep the intensity low to moderate, and treat rest as a valid option on the days you need it.

Which phase is best for lifting heavy?

The follicular phase and ovulation, so roughly the first half of your cycle through to the middle. Estrogen is rising and energy is climbing towards its peak, which is when most women find strength work feels best. If you want to attempt a personal best, aim for these weeks.

Why do I feel weaker in my luteal phase?

In the luteal phase estrogen drops and progesterone rises, which can raise your body temperature and cause fluid retention and bloating. Many women feel heavier, slower and more tired as a result. It is not a lack of discipline, it is your hormones, and lowering the intensity for a week is a sensible response rather than a setback.

Does cycle syncing work if my cycle is irregular or I am on hormonal contraception?

Hormonal contraception changes your hormonal pattern, and an irregular cycle makes the phases harder to predict, so the four-phase map may not line up neatly for you. The underlying principle still works: track your energy, mood and strength for a couple of months, and plan your harder sessions for the weeks you consistently feel strongest. If your cycle is very irregular or your symptoms are severe, please speak to your GP.

What is a cycle syncing diet?

Eating with your cycle rather than against it: steady protein at every meal all month, extra energy-rich food planned into the luteal phase when appetite genuinely rises, and carbohydrates supporting the weeks you train hardest. It is an adjustment, not a diet, and if your symptoms are severe enough to change how you eat dramatically, that is a conversation for your GP.

A note before you plan your month

Scientific research into women's energy and performance across the menstrual cycle is still limited, so treat all of this as a guide rather than gospel. What matters far more is what you notice in your own body over a few months. If your levels of strength, motivation and energy do fluctuate across your cycle, this gives you a way to work with that instead of feeling like you are failing.

If you would like help building a plan that bends around your cycle, your schedule and your actual life, that is exactly what I do in online personal training. Every plan starts with a free 15-minute discovery call.