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Most apps ask for your trust. This one would rather earn it — every formula is drawn from published research, cited inside the app, and explained in plain language. Here's a preview of the Playbook.
After ovulation, resting energy expenditure measurably rises. Most apps pretend every day is the same — Sérénité Active doesn't. This guide walks through the research behind the adaptive range.
Fuelling relative to your training load matters more than any single number. Here's how energy availability is calculated against fat-free mass, and why active women in midlife are especially at risk of running on empty.
If you know your body composition, the maths gets better. Which calculation basis fits your data — and when a genetically tested macro split earns the manual override.
Fiber gets treated as an afterthought almost everywhere. Here's why it sits alongside protein as a first-class target, and what the research says about fiber, satiety and hormones in perimenopause.
The evidence behind the −150 to +250 adjustment window — and why slow, feedback-driven changes consistently outperform aggressive deficits in midlife.
What we really know about phase-based training, what we honestly don't yet, and how the coaching handles that uncertainty responsibly.
Sérénité Active is a nutrition and training companion — not a medical device. It doesn't diagnose, it doesn't replace your GP or specialist, and it won't promise what the research can't support. Where the science is still emerging (and in female physiology, plenty is), the Playbook says so plainly. I think you'd rather have honesty than hype.
Every guide, every citation, every formula — explained where you actually use it.
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