Taybeh Roghani1, Minoo Khalkhali Zavieh1, Abbas Rahimi1, Saeed Talebian2, Farideh Dehghan Manshadi1, Alireza Akbarzadeh Baghban3, Nicole King4, Wendy Katzman4. 1. a Department of Physiotherapy , School of Rehabilitation, Shahid Beheshti University of Medical Sciences , Tehran , Iran. 2. b Department of Physiotherapy, School of Rehabilitation, Tehran University of Medical Sciences and Health Services , Tehran , Iran. 3. c Department of Basic Sciences, Proteomics Research Center, School of Rehabilitation, Shahid Beheshti University of Medical Sciences , Tehran , Iran. 4. d Department of Physical Therapy and Rehabilitation Sciences , University of California , San Francisco , USA.
Abstract
OBJECTIVE: The purpose of this study was to investigate the intra-rater reliability and validity of a designed load cell setup for the measurement of back extensor muscle force and endurance. PARTICIPANTS: The study sample included 19 older women with hyperkyphosis, mean age 67.0 ± 5.0 years, and 14 older women without hyperkyphosis, mean age 63.0 ± 6.0 years. METHODS: Maximum back extensor force and endurance were measured in a sitting position with a designed load cell setup. Tests were performed by the same examiner on two separate days within a 72-hour interval. The intra-rater reliability of the measurements was analyzed using intraclass correlation coefficient (ICC), standard errors of measurement (SEM), and minimal detectable change (MDC). The validity of the setup was determined using Pearson correlation analysis and independent t-test. RESULTS: Using our designed load cell, the values of ICC indicated very high reliability of force measurement (hyperkyphosis group: 0.96, normal group: 0.97) and high reliability of endurance measurement (hyperkyphosis group: 0.82, normal group: 0.89). For all tests, the values of SEM and MDC were low in both groups. A significant correlation between two documented forces (load cell force and target force) and significant differences in the muscle force and endurance among the two groups were found. CONCLUSION: The measurements of static back muscle force and endurance are reliable and valid with our designed setup in older women with and without hyperkyphosis.
OBJECTIVE: The purpose of this study was to investigate the intra-rater reliability and validity of a designed load cell setup for the measurement of back extensor muscle force and endurance. PARTICIPANTS: The study sample included 19 older women with hyperkyphosis, mean age 67.0 ± 5.0 years, and 14 older women without hyperkyphosis, mean age 63.0 ± 6.0 years. METHODS: Maximum back extensor force and endurance were measured in a sitting position with a designed load cell setup. Tests were performed by the same examiner on two separate days within a 72-hour interval. The intra-rater reliability of the measurements was analyzed using intraclass correlation coefficient (ICC), standard errors of measurement (SEM), and minimal detectable change (MDC). The validity of the setup was determined using Pearson correlation analysis and independent t-test. RESULTS: Using our designed load cell, the values of ICC indicated very high reliability of force measurement (hyperkyphosis group: 0.96, normal group: 0.97) and high reliability of endurance measurement (hyperkyphosis group: 0.82, normal group: 0.89). For all tests, the values of SEM and MDC were low in both groups. A significant correlation between two documented forces (load cell force and target force) and significant differences in the muscle force and endurance among the two groups were found. CONCLUSION: The measurements of static back muscle force and endurance are reliable and valid with our designed setup in older women with and without hyperkyphosis.
Entities:
Keywords:
Spine; back extensor; endurance; hyperkyphosis; maximal static force; reliability; validity; women