30s STS Norm Calculator

Need a quick way to assess lower body strength and fall risk? This 30-Second Sit-to-Stand (STS) Norm Calculator—built by Minneapolis-based Doctor of Physical Therapy, Austin Treadwell —lets you easily score performance and compare it to age- and sex-matched norms.

Whether you're a clinician, trainer, or caring for a loved one, this tool supports informed decisions for strength, function, and safety.

30‑Second Chair Stand Normative Calculator

The 30-Second Sit-to-Stand Test is a validated measure of lower body strength and functional mobility—key indicators for independence, fall risk, and overall fitness. This calculator makes it easy to input reps and immediately see how performance compares to evidence-based norms for age and gender. Use it in the clinic, at home, or during wellness screenings to track progress and guide exercise interventions.

Diagram of a woman completing the 30s STS test for Online Norm Calculator
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