The Reliability and Validity of the ArmCare Strength and Range of Motion Sensor and Mobile Application in Baseball Players.
Kyle A Matsel, Megan Burns, Jon Newbold and 2 others
PMID 40904715WHAT IT FOUND
Baseball players could reliably self-test shoulder strength with the ArmCare system, matching physical therapist measures.
However, self-tested range of motion was inconsistent and did not match therapist measurements. Use this device for strength monitoring, but not for range of motion.
Key findings
01Self-administered strength testing showed moderate to good reliability and validity compared to physical therapist dynamometry.
02Self-administered range of motion testing showed poor reliability and poor validity compared to physical therapist goniometry.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The study only included male high school and college baseball players, so results may not apply to female athletes, other sports, or different age groups. Range of motion was measured in different positions for the self-test (half-kneeling) versus the therapist test (supine), which may have affected validity. The study cannot determine if poor range of motion results were due to the hardware sensor or the self-guided software instructions.
The easy way to misread this
Do not assume the device is accurate for all shoulder metrics. While strength tracking is valid, the range of motion data is unreliable and should not be used to make clinical decisions about mobility deficits.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →