Comments on "Evaluation of functional parameters of the foot and ankle in elderly with sarcopenia".

The paper title does not contain this information 1 , but Souza Júnior et al. 1 identified sarcopenic elderly people through the SARC-F score and grip-force strength using a Jamar dyna-mometer. Traditionally, the Jamar dynamometer is the reference standard tool for grip-force strength evaluations with excellent validity and reliability in the clinic and research 2,3 , and many health professionals use it for measuring grip-force strength and recording a single maximal or submaximal grip-force strength value during testing 2,3 . Nevertheless, the Jamar dynamometer is a mechanical measurement tool and only shows instantaneous grip-force strength, which means that it cannot continuously record handgrip force or show changes in the quality of grip-force strength control. The Jamar dynamometer also needs recalibration each year 4 , and a study reported that its limited contact area may cause hand pain in subjects, thereby influencing the grip-force measurement when applying higher grip strength 5,6 . Souza Júnior et al. 1 did not report these adjustments.