# UMO

> umo — AI sport scientist for everyday athletes. Neuroscore is our daily readiness score (0–100) combining HRV, sleep, reaction time, tremor, and subjective wellness into one signal you can act on. Content is reviewed by Scott Mongold, PhD (Neuromechanics, Université Libre de Bruxelles).

For the full inlined content of the glossary, tools, and blog, see https://umo-health.com/llms-full.txt

## Core pages
- [Homepage](https://umo-health.com/): What UMO does and who it's for
- [About UMO](https://umo-health.com/about): Team, mission, scientific review, editorial process
- [Case Studies](https://umo-health.com/case-studies): umo performance research — reaction-time field study (n=2,178) and a volleyball Neuroscore vs. CMJ white paper
- [Editorial Policy](https://umo-health.com/editorial-policy): How UMO sources, writes, reviews, and corrects content
- [Medical Review Process](https://umo-health.com/medical-review-process): Who reviews UMO's health content and how
- [Get umo](https://umo-health.com/join-beta): Download umo on iOS and Android
- [UMO for Coaches](https://umo-health.com/umo-for-coaches): Athlete readiness monitoring for teams
- [1RM Calculator](https://umo-health.com/1rm-calculator): Free one-rep-max strength calculator using the Epley formula
- [FAQ](https://umo-health.com/faq): Common questions about umo, Neuroscore, integrations, and how to get the app
- [Careers](https://umo-health.com/careers): Open roles at UMO

## Free tools
- [ACWR Calculator](https://umo-health.com/tools/acwr-calculator/): Acute:chronic workload ratio from your recent training sessions (RPE × duration)
- [HRV Calculator](https://umo-health.com/tools/hrv-calculator/): RMSSD, ln(RMSSD), and SDNN computed from raw RR/IBI intervals
- [Sleep Debt Calculator](https://umo-health.com/tools/sleep-debt-calculator/): Cumulative sleep debt and trend from your nightly sleep over 1–2 weeks
- [1RM Calculator](https://umo-health.com/1rm-calculator/): One-rep-max estimate using the Epley formula

## Glossary
- [Glossary index](https://umo-health.com/glossary/): Definitions of the metrics behind smarter training
- [Heart Rate Variability (HRV)](https://umo-health.com/glossary/hrv/): Heart rate variability (HRV) is the variation in time between consecutive heartbeats, measured in milliseconds. Higher HRV generally reflects a more recovered, 
- [Acute:Chronic Workload Ratio (ACWR)](https://umo-health.com/glossary/acwr/): The acute:chronic workload ratio (ACWR) compares the training load you did this week (acute) to your rolling average load over the last four weeks (chronic). A 
- [Autoregulation](https://umo-health.com/glossary/autoregulation/): Autoregulation is the practice of adjusting your training — load, volume, or intensity — day to day based on how prepared you are on that specific day, rather t
- [Deload](https://umo-health.com/glossary/deload/): A deload is a planned, temporary reduction in training load — typically lower volume, intensity, or both for about a week — used to let accumulated fatigue diss
- [Rate of Perceived Exertion (RPE)](https://umo-health.com/glossary/rpe/): Rate of perceived exertion (RPE) is a subjective scale — most commonly 0–10 in strength training — that rates how hard a set or session felt. In lifting, RPE is
- [Training Readiness](https://umo-health.com/glossary/readiness/): Training readiness is an estimate of how prepared your body and nervous system are to handle hard training on a given day. It blends recovery signals — such as 
- [Neuroscore](https://umo-health.com/glossary/neuroscore/): Neuroscore is umo's daily training-readiness score (0–100). It combines five inputs — heart rate variability, sleep, reaction time, tremor, and subjective welln

## Blog — Health
- [Low Energy Availability: How Under-Fueling Alters Your Endocrine System](https://umo-health.com/blog/low-energy-availability-how-under-fueling-alters-your-endocrine-system): When dietary intake fails to cover both training and basic physiology, the body defends survival by suppressing “optional” endocrine functions. This threshold is the core of Relati
- [The Cortisol Awakening Response: What Your Morning Cortisol Spike Reveals About Training Readiness](https://umo-health.com/blog/the-cortisol-awakening-response-and-training-readiness): The cortisol awakening response (CAR) is the 50–75% increase in cortisol within 30-45 minutes of waking. A blunted, flattened CAR is one of the earliest endocrine signatures of acc
- [Does Muscle Memory Exist? The Myonuclear and Epigenetic Science of Regaining Lost Fitness](https://umo-health.com/blog/does-muscle-memory-exist): Muscle memory isn’t a metaphor. When you train, fibers gain myonuclei that are retained through detraining and atrophy, and your DNA keeps epigenetic “tags” from prior growth.
- [Post-Activation Potentiation Explained: Why a Heavy Set Can Make You Faster Minutes Later](https://umo-health.com/blog/post-activation-potentiation-explained): A hard contraction can briefly boost power in the minutes that follow. There are two mechanisms: true post-activation potentiation (PAP), a phosphorylation effect lasting under a m
- [Strength Before Size: How Neural Adaptation Drives Your First Strength Gains](https://umo-health.com/blog/strength-before-size-how-neural-adaptation-drives-strength-gains): For the first 4-6 weeks of a strength program, almost all of your strength gain comes from the nervous system, not larger muscles. Increased motor unit recruitment, faster firing r
- [The Neuroscience of Training Consistency: How Workouts Become Automatic Habits](https://umo-health.com/blog/the-neuroscience-of-training-consistency): Motivation gets you to start; automaticity keeps you going. Exercise becomes a habit when repetition in a stable context shifts control from the goal-directed prefrontal cortex to 
- [Sleep Architecture vs. Sleep Duration: What Athletes Get Wrong About Recovery](https://umo-health.com/blog/sleep-architecture-vs-sleep-duration): Eight hours of fragmented sleep is not eight hours of recovery. For athletes, the distribution of deep sleep and REM in the first half of the night drives growth-hormone release, g
- [Best HRV-Based Training Apps in 2026](https://umo-health.com/blog/best-hrv-based-training-apps-2026): Dozens of apps collect HRV data. Almost none use it to change what you do. The difference matters: a number on a dashboard doesn’t reduce overtraining.
- [What "Readiness" Means (And Why Most Apps Get It Wrong)](https://umo-health.com/blog/what-readiness-really-means): Readiness is not a number, it is a forecast. Most apps reduce it to a green-yellow-red traffic light system. Real readiness is a probability distribution: how likely your body is t
- [Why Your HRV Drops After a Hard Workout (And What That Tells You)](https://umo-health.com/blog/why-your-hrv-drops-after-a-hard-workout): A drop in HRV after a hard session is not a failure, it is the autonomic nervous system doing exactly what it is supposed to do. The signal that matters is not tomorrow morning's n
- [Breathing Mechanics and Performance: What Nasal Breathing, CO2 Tolerance, and Respiratory Muscle Training Do](https://umo-health.com/blog/breathing-mechanics-nasal-co2-respiratory-training): Learn when nasal breathing helps performance, why CO2 tolerance matters more than oxygen intake, and what respiratory muscle training can (and can't) improve.
- [Gut-Brain Axis in Exercise: How Your Microbiome Influences Performance and Recovery](https://umo-health.com/blog/gut-microbiome-exercise-performance-recovery): Your gut microbiome isn't passive, it metabolizes lactate into fuel, modulates inflammation, and determines gut distress tolerance. Evidence-based strategies for gut health without
- [Tendon Health and Load Management: The Overlooked Key to Injury-Free Training](https://umo-health.com/blog/tendon-health-load-management-injury-prevention): Tendons adapt slower than muscles. Understand why rapid load increases cause tendinopathy, why complete rest makes it worse, and how progressive loading strategies prevent and reha
- [Heart Rate Metrics and Training: What HRV, Resting Heart Rate, and Heart Rate Recovery Tell You](https://umo-health.com/blog/heart-rate-metrics-hrv-resting-recovery): HRV isn't the only heart rate metric that matters. Learn how to combine HRV trends, resting heart rate, and heart rate recovery into a practical framework for training decisions an
- [Sleep Architecture and Athletic Performance: Why Deep Sleep Is Your Best Recovery Tool](https://umo-health.com/blog/sleep-architecture-athletic-performance-deep-sleep): Sleep duration isn't enough, sleep architecture determines recovery quality. Learn how N3 slow-wave sleep drives growth hormone release, immune function, and brain waste clearance,
- [The Science of Deload Weeks: Why Training Less Can Make You Stronger](https://umo-health.com/blog/deload-week-guide): Deload weeks feel like cheating, but the physiology says otherwise. Learn why planned recovery weeks are one of the most evidence-based tools for long-term progress.
- [How Much Protein Do You Need? A Science-Based Guide for Active People](https://umo-health.com/blog/how-much-protein-per-day): The RDA for protein is set for survival, not performance. Here's what the science says about optimal protein intake for active people.
- [Grip Strength and Longevity: Why This Simple Metric Predicts How Long You'll Live](https://umo-health.com/blog/grip-strength-longevity-health): Grip strength is one of the most robust predictors of all-cause mortality — stronger than blood pressure or BMI in large cohort studies. Here's what the science shows.
- [Progressive Overload: The Only Training Principle That Matters](https://umo-health.com/blog/progressive-overload-training-guide): Progressive overload isn't just 'add more weight.' Understand the four dimensions of training load and how to apply them to break through plateaus.
- [Cold Water Immersion: What the Evidence Says About Ice Baths and Cold Plunges](https://umo-health.com/blog/cold-water-immersion-ice-bath-benefits): The science behind ice baths and cold plunges is more nuanced than the hype. Here's what the research shows about recovery, muscle growth, and inflammation.
- [The Best Longevity Tests Are Free: 3 Movement Assessments That Predict Mortality Better Than Supplements](https://umo-health.com/blog/the-best-longevity-tests-are-free): Today’s longevity influencer playbook is predictable: Create anxiety about aging. Sell you the solution. Repeat monthly for a nice fee.
- [Cortisol and Exercise: Why Chronic Stress Is Undermining Your Training](https://umo-health.com/blog/cortisol-exercise-chronic-stress-training): Cortisol is essential for performance — but chronically elevated, it sabotages everything. A neuroscientist explains the HPA axis, overtraining syndrome, and how to manage it.
- [Sleep and Athletic Recovery: What Your Brain Does While You Rest](https://umo-health.com/blog/sleep-athletic-performance-brain-recovery): What actually happens in your brain during sleep? A neuroscientist explains sleep stages, the glymphatic system, and why sleep is the most underused recovery tool in sport
- [How to Improve Your HRV: What the Research Says](https://umo-health.com/blog/how-to-improve-hrv): Want to improve your HRV? A neuroscientist breaks down the evidence-backed interventions that actually work — from sleep and breathing to exercise and cold exposure.
- [What Is HRV? A Neuroscientist's Guide to Heart Rate Variability](https://umo-health.com/blog/what-is-hrv-heart-rate-variability): What is HRV? A sports scientist explains heart rate variability — what it measures, what your number means, and how to use it to train smarter.
- [The 10 Most Popular Health Metrics: What's Normal, What's Not, and What to Do About It](https://umo-health.com/blog/the-10-most-popular-health-metrics): Your wrist tracks dozens of numbers, but most users, whether casual gym-goers or competitive athletes struggle to interpret what changes actually mean… and this is weird because mi

## Blog — Science
- [Jet Lag Isn't Just Fatigue: It's a Performance Killer (And What Actually Helps)](https://umo-health.com/blog/jet-lag-performance-killer-what-actually-helps): Jet lag isn’t just travel fatigue—it’s a measurable disruption of your body’s circadian system that can reduce strength, power, endurance, reaction time, and decision-making for da
- [Endurance Programming Isn’t Complete Without Strength (Part 2)](https://umo-health.com/blog/endurance-programming-without-strength-part-2): Here's what effective strength work looks like when you're optimizing for endurance performance (and not bodybuilding).
- [Endurance Programming Isn’t Complete Without Strength (Part 1)](https://umo-health.com/blog/endurance-programming-strength-part-1): If you're training for marathons, ultras, triathlons, cycling, rowing, or any other endurance-based sport, and you're not lifting weights, it’s time to reconsider.
- [What Does Science Say About Recovery Strategies? Part 2](https://umo-health.com/blog/recovery-strategies-part-2): In this blog we break down which recovery strategies are backed by science, and which are mostly hype.
- [What Does Science Say About Recovery Strategies? Part 1](https://umo-health.com/blog/what-does-science-say-about-recovery-strategies-part-1): So, the harsh reality is that recovery takes time. But, are there ways we can recover more efficiently?
- [Why Your Nervous System Keeps the Brakes On: The Science of Recovery](https://umo-health.com/blog/on-the-science-of-recovery): A quick note: For this blog, I'll focus specifically on recovery from resistance training. I'll do my best to explain the science in the most understandable way possible, so everyo

## Blog — Technology
- [On Intentionality and Health in the Age of AI](https://umo-health.com/blog/on-intentionality-and-health-in-the-age-of-ai): Technology is undoubtedly changing our lives for the better. We are building a startup and, of course, we are radical optimists who believe in progress and the upside of innovation
- [The Accelerometer: So Much More than a Step-Counter](https://umo-health.com/blog/the-accelerometer-so-much-more-than-a-step-counter): Last week, I ended my blog on quite a cliffhanger. I told you that I would discuss how umo is leveraging sensors to power movement intelligence. Pretty catchy, but also incredibly 
- [Health Tracking: Current State Of Affairs](https://umo-health.com/blog/health-tracking-current-state-of-affairs): Alright everyone, blog #3 coming in hot.
- [Why We Built umo: Our Vision And Community](https://umo-health.com/blog/why-we-built-umo): We built umo because we needed umo. Our vision is shaped by building a product that solves a fundamental challenge we and many more people are facing.

## Blog — Sports
- [From Gym Rat to Lab Rat: A Personal Introduction
](https://umo-health.com/blog/umo-scott-intro): If you’re reading this, you’re either my mom, or someone genuinely interested in what umo health has to offer. In both cases, thank you for taking the time.

## About
- Scientific reviewer: Scott Mongold, PhD — Neuromechanics at Université Libre de Bruxelles (ULB). 10+ years of strength coaching. [LinkedIn](https://www.linkedin.com/in/smongold/) · [Google Scholar](https://scholar.google.com/citations?user=IFMSx3QAAAAJ&hl=en)
- Founder & CEO: Andrea Quattrocchi
- Contact: info@umo-health.com
- LinkedIn: https://www.linkedin.com/company/umohealth/
- Instagram: https://www.instagram.com/umocommunity/