Reliability and Validity of a New Eccentric Hamstring Strength Measurement Device.

Only 19 participants were analysed, and all were young male college field-sport athletes, so the findings do not show how the device performs in women, older adults, injured patients, or general clinic populations. The sample size was low, and the authors noted difficulty controlling participants' team training between testing sessions. Fatigue or minor injuries elsewhere in the kinetic chain may have affected results. The device cannot control repetition speed or provide an angle of peak torque, which limits use when a specific joint angle matters. It does not provide a coefficient of variance value to judge repetition validity, and repeated transport may raise recalibration questions. The study did not monitor how many Hamstring Solo Elite repetitions were lost because of poor control or incomplete repetitions, so usability in wider populations is unclear.

No funding source or conflict-of-interest declaration is given in the supplied text. Equipment suppliers are listed: Hamstring Solo Elite from ND Sports Performance, Wattbike from T+F Fitness Systems Ltd, Biodex from Biodex Medical Systems, Inc., and IBM SPSS from IBM.

Do not conclude that the device is proven for patients with hamstring problems or for all clinical settings. It was tested only in 19 healthy young male college field-sport athletes, and the authors report a small sample size.