The Phase blog
Evidence-checked guides on strength training and the menstrual cycle — including the parts of the research that don't flatter us. Every claim is sourced.
· 7 min read · Privacy
Where your cycle data is stored decides who can ever get at it. Seven questions to ask any tracker, how to check each one yourself, and what the answers mean.
Read the post →· 8 min read · The evidence
A multilevel meta-analysis compared hormonal contraceptive users with non-users on strength, power and muscle growth. The honest answer is reassuring — and it changes how you should plan.
Read the post →· 8 min read · Training guide
Most lifters feel best in the two weeks after their period starts. Here's how to turn that into progressive overload instead of one good session you never repeat.
Read the post →· 9 min read · Training guide
You don't need a different program for your luteal phase — you need three adjustable dials. What to change, what to leave alone, and the myth that costs women the most progress.
Read the post →· 8 min read · Training guide
The bar feels heavier, the sets feel longer, and the numbers usually haven't moved. Here's what's actually changing in the week before your period — and the four dials worth adjusting.
Read the post →· 11 min read · Comparison
Most lists in this category are padded with period trackers and meditation apps. We compared the nine that actually change your training — Wild.AI, FitrWoman, Jennis, Sync N, Drop It and the rest — and named a winner per use case.
Read the post →· 10 min read · The evidence
We build a cycle-aware training app, and we'll say it plainly: the strong version of cycle syncing isn't supported by the evidence. Here's what the research does show — and what to do with it.
Read the post →· 8 min read · Comparison
Strong, Hevy, Flo, Clue, Wild.AI, FitrWoman — we compared the most popular workout trackers and cycle apps, and found the gap every one of them leaves open.
Read the post →· 9 min read · Training guide
What to do in your menstrual, follicular, ovulatory and luteal phases — plus a 4-week strength template you can start this cycle.
Read the post →· 6 min read · Training guide
Yes, you can lift on your period. Here's how to adjust volume, intensity and expectations during your menstrual phase — without losing progress.
Read the post →· 5 min read · The science
The stretch of your cycle when strength and power output tend to peak — the science, the one caution, and how to find yours.
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