Validity Of Hand-held Dynamometer Research Articles

Reliability and Validity of Hand-Held Dynamometer and Hand-Held Sphygmomanometer for Testing Shoulder Isometric External and Internal Rotator Muscles Strength

Reliability and Validity of Hand-Held Dynamometer and Hand-Held Sphygmomanometer for Testing Shoulder Isometric External and Internal Rotator Muscles Strength

Validity of hand-held dynamometer in assessing isometric leg strength in older adults

Purpose This study examined the accuracy and consistency of hand-held dynamometer (HHD) in assessing leg muscle strength in older adults. Methods Forty-eight elderly men and women (12 males and 36 females), aged 60-85 years, were recruited for this study. All study participants had anthropometric measurements, handgrip, the HHD, and isokinetic dynamometer tests. Pearson partial correlations were used to examine the validity of HHD compared with an isokinetic dynamometer after adjustment for age, sex, and race. Cronbach α coefficients were used to estimate the test-retest reliability of the HHD measurement. Results Age-, sex-, and race-adjusted partial Pearson correlation coefficients were 0.90 for isometric leg strength (p < 0.001), 0.62 for isokinetic leg strength (p < 0.001), and 0.63 for handgrip strength (p < 0.001) with the HHD. Cronbach α coefficients showed high interclass reliabilities in measuring leg muscle strength using the HHD in men (α=0.99) and women (α=0.96). Conclusions The HHD had good concurrent validity with high interclass reliability in assessing leg muscle strength in older adults. </sec>

Reliability and Validity of Isometric Knee Extensor Strength Test With Hand-Held Dynamometer Depending on Its Fixation: A Pilot Study

ObjectiveTo determine the reliability and validity of hand-held dynamometer (HHD) depending on its fixation in measuring isometric knee extensor strength by comparing the results with an isokinetic dynamometer.MethodsTwenty-seven healthy female volunteers participated in this study. The subjects were tested in seated and supine position using three measurement methods: isometric knee extension by isokinetic dynamometer, non-fixed HHD, and fixed HHD. During the measurement, the knee joints of subjects were fixed at a 35° angle from the extended position. The fixed HHD measurement was conducted with the HHD fixed to distal tibia with a Velcro strap; non-fixed HHD was performed with a hand-held method without Velcro fixation. All the measurements were repeated three times and among them, the maximum values of peak torque were used for the analysis.ResultsThe data from the fixed HHD method showed higher validity than the non-fixed method compared with the results of the isokinetic dynamometer. Pearson correlation coefficients (r) between fixed HHD and isokinetic dynamometer method were statistically significant (supine-right: r=0.806, p<0.05; seating-right: r=0.473, p<0.05; supine-left: r=0.524, p<0.05), whereas Pearson correlation coefficients between non-fixed dynamometer and isokinetic dynamometer methods were not statistically significant, except for the result of the supine position of the left leg (r=0.384, p<0.05). Both fixed and non-fixed HHD methods showed excellent inter-rater reliability. However, the fixed HHD method showed a higher reliability than the non-fixed HHD method by considering the intraclass correlation coefficient (fixed HHD, 0.952-0.984; non-fixed HHD, 0.940-0.963).ConclusionFixation of HHD during measurement in the supine position increases the reliability and validity in measuring the quadriceps strength.