The 432 blog

The research our moms never got.

What changes in perimenopause and midlife, what the research actually says, and how we train for it. Plain answers, sources linked.

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Latest · The Objections

Is 3 Workouts a Week Enough? What Most Routines Miss in Perimenopause

Three smart workouts a week can cover a lot in perimenopause. Here’s what your body needs now, and how to fit 432 with the training you already love.

November 11, 2026 · 4 min read

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All five systems

The Questions

What Does Estrogen Actually Do Anyway? (Spoiler: It’s More Than Sex and Babies)

Estrogen works all over your body. Here are 5 important systems it protects, what changes as it declines, and how to train them.

November 11, 2026 · 4 min read

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All five systems

The Questions

When Does Perimenopause Start? (And How It’s Different From Menopause)

Most women start perimenopause in their 40s, but over half of women 30 to 35 already report moderate-to-severe symptoms. Here’s what that means.

November 11, 2026 · 3 min read

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The Questions

Why Are Women More Likely to Get Alzheimer’s? (And What You Can Do About It Now)

In the US, almost two-thirds of people living with dementia are women. Here’s what longevity, estrogen and midlife have to do with it, and what actually helps.

November 11, 2026 · 4 min read