FITDAT is the complete open toolkit for building fully specified, reproducible fitness scores — tests, score sets, standards, feedback tables, reference bands, developer tools, and API access. Everything you need to define, calculate, and communicate a fitness result, in one governed, versioned library.
Building a rigorous, reproducible fitness score is a deliberate process with multiple layers. FITDAT provides all of them — openly, in one governed library. It is not just a list of tests. It is the complete infrastructure for defining, calculating, and communicating a fitness result in a way that is comparable across populations, contexts, and time.
Every fully specified score built on FITDAT draws from the same set of building blocks: Tests that define what is measured and how. Score Sets that declare which tests to use, how to weight them, and how to aggregate them into a composite score. Standards (StandardSets) that provide versioned reference distributions by population. Reference Bands with descriptive feedback at every score level — per test and per score set. And developer tools and API access that make all of it buildable by any organization.
The library is designed to grow. Version 1 was instantiated with the 14 tests that form the REALFIT Absolute Score — a deliberate demonstration of the precision FITDAT requires. The long-term vision is a library of hundreds of tests and score sets — military standards, occupational screens, sports combines, general population benchmarks, and community-contributed assessments — all speaking the same language.
FITDAT sits between the governing authority and the applications built on top of it. Understanding the separation between layers is the key to understanding what FITDAT is for — and what it deliberately is not.
FITDAT v1 was instantiated with the 14 tests that form the REALFIT Absolute Score — not because these are the only tests that matter, but because publishing them first demonstrates exactly what FITDAT requires of every test in the library.
Each of these 14 tests has a complete TestDefinition, a versioned TestProtocol, defined Metrics, Component assignments with rationale, and published StandardSets tied to specific populations. The Absolute Score methodology — how these tests are weighted, normalized, and combined into a single 0–1,000 score — is published openly as the reference implementation of what a Score Set built on FITDAT looks like.
This is the standard we hold every future test and score set to. Contribute to the library. Publish your score set. Adopt FITDAT for your organization's fitness standard. The library grows as the community commits to the same level of rigor.
FITDAT is essential infrastructure for any organization that cares about rigorous, reproducible fitness measurement. Whether you are publishing a new test, building a score set, or adopting FITDAT for your organization's fitness standard — the process is the same: meet the specification, submit for review, get published.
To discuss contributing to the library, publishing a score set, or adopting FITDAT for your organization: hello@realfit.com
FITDAT is essential to REALFIT's mission to become the largest and most trusted source of fitness analytics in the world. Without a common language, fitness data cannot compound, scale, or achieve institutional trust. A result produced in one context means nothing in the next. A standard that exists only inside one organization's system is not a standard — it is a silo.
The fitness world has always had tests. What it has never had is a common language to make them comparable. FITDAT is that language. Open, governed, and designed to grow — with the level of precision that makes real comparison possible for the first time.
Many paths to fitness. One language to measure them all.