Body Composition
Estimate your flexibility percentile and rating from a sit-and-reach test score, adjusted for age and sex. Find your tier and how far you are from Good.
Above average flexibility. Keep up your routine and explore yoga or dynamic stretching to push higher.
Where your flexibility sits across the 5 rating tiers.
Disclaimer: Flexibility norms are general population averages based on standardised sit-and-reach testing. Individual results vary based on body proportions, warm-up, and prior activity. This is not medical advice - consult a physiotherapist for a full flexibility evaluation.
Contract, discovery endpoints, and developer notes for agent use.
Always available for agents
Tool contract JSON
https://aifithub.io/contracts/flexibility-score-calculator.jsonStable input and output contract for this exact tool.
Human review
People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.
{
"tool": "flexibility_score",
"reach_cm": 25,
"age": 30,
"gender": "male"
} No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.
Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.
Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.
A sit-and-reach test measures hamstring and lower-back flexibility. You sit on the floor with legs straight and reach forward as far as possible. The distance reached (in cm) is your score.
If you can't reach your feet, your score is negative — measured in cm short of the baseline at foot position. Negative scores are common for people with tight hamstrings.
The norms are based on standardised fitness testing tables and are reasonable estimates. Individual variation means professional assessment gives more precise results.
Most people see measurable flexibility gains within 4–8 weeks of consistent daily stretching. Dynamic warm-up and static cool-down stretching work best together.
Yes. AI Fit Hub tools are free, browser-based, and no-signup. Your inputs stay in your browser.
No. This is a general estimate based on population norms — not a medical assessment. Consult a physiotherapist for a full flexibility evaluation.
Related Resources
Every link here is tied directly to Flexibility Score Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.
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