What does the evidence actually say?
SSMT grades the claims sports technology makes, one claim at a time, so coaches and clinicians have something defensible to say when an athlete asks. Every grade is permanent, dated, citable, and carries the specific study that would change it.
No claims match.
How grading works
Three claim types. Most sports-tech claims are measurement claims wearing practice clothing. A vendor saying “validated to reduce injury risk” is usually asserting P while holding evidence for M. Where a marketed claim spans both, it gets two cards — so the false half cannot ride on the true half.
Seven drift axes. Each compares what a study tested against what the marketing says: Population · Setting · Comparator · Outcome · Magnitude · Reproducibility · Independence. ▲ drift · – aligned · ⋯ not assessed.
Verdicts bind to a device class, not a product category. “VBT devices are accurate” is simultaneously true for linear transducers (±0.02 m/s) and false for one IMU (CV 75.8%).
Nothing here says a product does not work. Where no evidence was found, the card says “no independent evidence located as of [date]” — a checkable statement about the search, not an unfalsifiable statement about reality.