Fit and release checks
Check wrist fit, the closure, and how the cuffs open.
Measure the wrist and read both ends of the fit range
Use a flexible tape on each wrist where the band would sit, without pulling the tape tight. Look for usable closed circumference, including with a cover in place. A maximum alone leaves the smallest fit unknown. Never tighten a cuff just to make the sizing work.
Identify what opens the cuff itself
A connector may detach the pair and leave each cuff closed. Check how each cuff opens, and follow the maker’s instructions before use. Agree on a stop signal, stay present, and stop as soon as either person wants to stop. NCSF’s consent guidance covers explicit permission and withdrawal.
Recognize signs to stop
Remove cuffs immediately for pain, tingling, numbness, swelling, or a change in hand color or temperature. Seek prompt medical care if symptoms persist or weakness develops. See Cleveland Clinic’s overview of nerve compression.