We are set to foster a holistic connection to one’s body—whether you’re training or simply moving for joy.

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WHY We Created Femur™️?

Simply, there is none. According to our survey, 55.9% of individuals expressed interest in syncing their workouts with their menstrual cycles but admitted they’re unsure where to start.

Most Fitness Programs Are Not for Individuals with Menstrual Cycles;

  1. Traditional fitness programs prioritize male physiology, valuing aesthetics over health. This may lead to higher risk of injury, oligomenorrhea, amenorrhea, or even infertility.

Calendar-Based Tracking is Outdated and Inaccurate;

  1. Manually tracking symptoms, energy levels, and exercise readiness can be overwhelming and time-consuming.
  2. Calendar-based tracking tools fail to account for the natural fluctuations of menstrual cycles. They typically rely on fixed cycle lengths to predict menstruation, which isn’t always accurate.
  3. Advanced algorithm-driven alternatives exist but are either focused solely on fertility (like the Ava Bracelet) or come with a steep price tag—some options, like the Oura Ring, cost up to $499.

Also, Taboo and Mystery Around Menstruation Keep Us from Knowing Our Bodies…

  1. Among marginalized communities, more than half of individuals don’t know when to expect their next period, and 47% are unfamiliar with what ovulation entails.
  2. Menstrual cycles aren’t as predictable as often assumed. For example, 23 out of every 100 people experience irregular cycles—a figure supported by our survey, which found this number to be 22.03%. Even for those with “regular” cycles, the duration and flow can vary significantly depending on factors like age and BMI.

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In our recent survey, we asked: What features or functions do you feel are missing in the app(s) you use? Here are some of the answers—

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Accuracy, adjusting exercise abilities to menstrual cycle

to be able to set different goals based on menstrual cycle

Recording my cycle and adjust my workout plan

More women centered content

How I feel after exercise; How to release muscle tension after exercise and how does that impact the next exercise; how to get back to routine after interrupted by menstrual.

  1. Menstrual cycle synced exercises during each phase.

  2. Lack of statistics related to the exercise or people

Idk, but it’d be nice if apps are more accommodating to people with different chronic illnesses or disability that don’t allow them to do certain types of work outs. I often feel discouraged even from doing yoga because there are postures i simply can’t do because of my condition and many yoga/fitness teachers don’t acknowledge that.

WHY We Should Care?

Ignoring the physiological differences between male and female bodies has perpetuated frustration, injury, and suboptimal performance for people with menstrual cycles.

Overtraining and hormonal imbalances not only undermine fitness progress but also have long-term health consequences, such as infertility, bone loss, and chronic fatigue.

Fear of discomfort, injury, or irregularities discourages many users from maintaining a consistently active lifestyle, which negatively affect both their mental and physical health.

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The Relative Energy Deficiency in Sport (RED-S) Framework is a conceptual model that explains how insufficient energy availability impacts physiological functions, including reproductive health, bone health, and athletic performance. Femur™️ specifically addresses RED-S, helping users maintain adequate energy levels, prevent overtraining, and achieve a sustainable balance for long-term wellness.

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HOW Femur™️ Innovates?

⌚ We collect data from users’ wearables, which can cost as little as $50, including Basal Body Temperature, Heart Rate, and Heart Rate Variability, all of which are correlated with menstrual cycles.

📊 All collected data is processed using a State-Space Model that excels in handling ecological time-series data and predicting dynamic process, especially when there is noise or uncertainty in observations.

🧠 The results from the State-Space Model are used as one layer in a Neural Network, along with other inputs like exercise intensity, energy expenditure, symptoms, mood, and users’ historical data.

❤️‍🩹 This Multi-Model identifies the user’s current menstrual phase, predicts their next menstruation, and provides personalized and phase-specific fitness or recovery plans.