By Bloom Lab Wellness

The Strength
Cycle

Syncing your workouts with your hormones

Women are born with two internal clocks. Most of us only train around one. This guide teaches you to train with both — building more muscle, burning more fat, and feeling better doing it.

Find your phase
Quick reference

How to run your workout
by phase

Menstrual
Days 1–7
Heavy weight Slow tempo Low reps Long rest No ab work
Follicular
Days 8–17
Increasing weight Higher volume Push intensity HIIT formats Cardio 2x/wk
Ovulation
Days 18–21
Heaviest weight Maximum effort Shortest rest PR window Train hard
Luteal
Days 22–26
First half
Med–heavy weight Slow & controlled Quality over speed
Luteal
Days 27–28
Second half
Light–med weight Higher reps Slow tempo Dial back intensity

Not sure what phase you are in? Use the calculator below.

Phase calculator

Where are you
in your cycle?

You are currently in
Menstrual Follicular Ovulation Luteal
Today's training guidance
The foundation

Your two
internal clocks

You've been trained to push hard every day, follow the same schedule every week, and ignore how your body actually feels. That approach was designed around male physiology. Your body operates on a different rhythm entirely.

Clock 01
Circadian
Your 24-hour daily cycle. Governs sleep, wakefulness, and daily energy patterns. This is the clock most training advice is built around.
Clock 02 — The one that changes everything
Infradian
Your 28-day hormonal cycle. Affects your brain, immune system, metabolism, microbiome, stress response, and reproductive system. Training with this clock is the key to building strength as a woman.
The methodology

The four phases
of your cycle

Phase 01 Menstrual 3–7 days
Hormonal state
Estrogen low Progesterone low All hormones lowest

This is not the time to push. Hormone levels are at their lowest, and high-intensity exercise will backfire — your body is primed to store fat rather than burn it when stressed during this phase. Work with it, not against it.

Deep, restful sleep is essential. Your body is in repair mode.

Training guidance
  • Heavy lifts at slow tempo, low reps — strength work is still valid, done gently
  • Flexibility, mobility, and stretch-focused sessions
  • Prioritize rest and recovery above all
  • No ab exercises — your uterus is contracting, avoid adding intra-abdominal pressure
  • Avoid HIIT and high-intensity cardio entirely
  • Deep restful sleep is a non-negotiable priority
Phase 02 Follicular 7–10 days
Hormonal state
Estrogen rising Testosterone rising Muscle-building phase

Energy levels begin to rise as estrogen and testosterone climb. This is your muscle-building window. Your body is primed to respond to training stimulus, recover faster, and build lean tissue. Don't waste it.

Begins directly after your bleed ends. Use the early days to ease back in, then ramp intensity through the week.

Training guidance
  • HIIT formats — EMOM, AMRAP, Tabata — your body can handle it now
  • Cardio 2x per week
  • Progressive overload — increase weight week over week
  • Compound lifts: squats, deadlifts, bench, rows
  • Higher volume training responds well this phase
  • This is the best time to attempt PRs and test new maxes
Phase 03 Ovulation 3–4 days
Hormonal state
Estrogen peak Testosterone peak Peak performance window

Estrogen and testosterone are at their absolute peak. You have energy to burn. This is your highest performance window in the entire cycle — treat it accordingly. Your strength output, endurance, and pain tolerance are all elevated.

Note: ligament laxity increases during ovulation — warm up thoroughly to protect joints.

Training guidance
  • Maximum intensity HIIT
  • Heavy strength training — this is your peak power window
  • Cardio 2x per week at higher intensity
  • PR attempts and max effort sets belong here
  • Train hard, train heavy — your body is built for it right now
  • Thorough warm-up to protect joints due to increased laxity
Phase 04 Luteal 10–14 days
Hormonal state
Progesterone rising Estrogen declining Two distinct halves

The luteal phase has two distinct windows that require different approaches. In the first half, estrogen and testosterone are still elevated while progesterone enters. In the second half, all hormones begin declining toward menstruation.

Listening to your body here is not weakness — it's smart programming.

Training guidance
First half (days 1–5 of luteal)
  • Strength training with medium to heavy weight
  • Slow and controlled tempo — quality over quantity
  • Still a productive strength window, use it
Second half (days 6–14 of luteal)
  • Strength training with light to medium weight
  • Slow, controlled movement — higher reps, lower intensity
  • Focus on form, mind-muscle connection, recovery
  • Begin transitioning toward rest as menstruation approaches
Nutrition support

The power of seeds

Seeds carry specific oils, vitamins, and nutrients that support your body's hormonal production. Adding the right seeds at the right time in your cycle can help minimize PMS symptoms and support hormonal balance.

First half of cycle
Day 1 – Day 14
Follicular + Ovulation phases
Ground flaxseeds 2 tbsp daily
Pumpkin seeds 1 tbsp daily
Second half of cycle
Day 14 – Day 28
Luteal + Menstrual phases
Ground sesame seeds 1 tbsp daily
Sunflower seeds 1 tbsp daily
Add seeds to smoothies, oatmeal, yogurt, or salads. Ground seeds absorb better than whole. Consistency over 2–3 cycles is when most women begin noticing a difference in PMS symptoms and energy levels.
Shop whole food supplements
Nutrition

Cycle-synced
macro calculator

Your macros shift across your cycle. This calculator gives you two targets — one for the first half, one for the second — so your nutrition works with your hormones, not against them.

Ready to train smarter

Access the full
training programs

Workouts built around your cycle, led by Bloom Lab Wellness. Every phase, every week — programmed so your training works with your hormones, not against them.

Access full training programs
Beyond the gym

The deeper work

Strength training with your cycle is just the beginning. These four lessons go deeper into the identity, rhythm, performance, and nourishment that make the whole system work.

01
Roots
Mindset & identity
02
Seasons
Seasons of the cycle
03
Strength
Productivity & mental performance
04
Nourish
Fueling your cycle