Cristina Cadenas-Sanchez1, Guillermo Sanchez-Delgado1, Borja Martinez-Tellez1, José Mora-Gonzalez1, Marie Löf2, Vanesa España-Romero3, Jonatan R Ruiz4, Francisco B Ortega4. 1. Cristina Cadenas-Sanchez, MSc; Guillermo Sanchez-Delgado, MSc; Borja Martinez-Tellez, MSc; and José Mora-Gonzalez, MSc, are PhD Students, PROFITH (PROmoting FITness and Health through physical activity) Research Group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain; address correspondence to cadenas@ugr.es. 2. Marie Löf, PhD, is Senior Researcher, Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden. 3. Vanesa España-Romero, PhD, is Lecturer, Department of Physical Education, School of Education, University of Cádiz, Puerto Real, Spain. 4. Jonatan R. Ruiz, PhD, and Francisco B. Ortega, PhD, are Senior Researchers, PROFITH Research Group, Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain, and Senior Researchers, Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
Abstract
OBJECTIVE: We examined the reliability and validity of the analog and digital models of TKK handgrip dynamometers using calibrated known weights. METHOD: A total of 6 dynamometers (3 digital and 3 analog; 2 new and 1 old for each model) were used in this study. RESULTS: Intrainstrument reliability was very high; systematic error for test-retest reliability was ≤|0.3 kg|. The systematic error among different instruments (same model) and between different models (digital vs. analog) ranged between |0.4 kg| and |0.6 kg|. The systematic error between new and old dynamometers ranged from |0.8 kg| to |1 kg|. All dynamometers provided lower values for the same known weights than a SECA scale, with a systematic error ranging from -0.94 to -2.64 kg. CONCLUSION: This study indicates that clinicians and investigators who provide treatment to address handgrip strength should use the same instrument and model for repeated measures. Distinguishing meaningful change from dynamometer variability is discussed.
OBJECTIVE: We examined the reliability and validity of the analog and digital models of TKK handgrip dynamometers using calibrated known weights. METHOD: A total of 6 dynamometers (3 digital and 3 analog; 2 new and 1 old for each model) were used in this study. RESULTS: Intrainstrument reliability was very high; systematic error for test-retest reliability was ≤|0.3 kg|. The systematic error among different instruments (same model) and between different models (digital vs. analog) ranged between |0.4 kg| and |0.6 kg|. The systematic error between new and old dynamometers ranged from |0.8 kg| to |1 kg|. All dynamometers provided lower values for the same known weights than a SECA scale, with a systematic error ranging from -0.94 to -2.64 kg. CONCLUSION: This study indicates that clinicians and investigators who provide treatment to address handgrip strength should use the same instrument and model for repeated measures. Distinguishing meaningful change from dynamometer variability is discussed.
Authors: Magdalena Cuenca-Garcia; Nuria Marin-Jimenez; Alejandro Perez-Bey; David Sánchez-Oliva; Daniel Camiletti-Moiron; Inmaculada C Alvarez-Gallardo; Francisco B Ortega; Jose Castro-Piñero Journal: Sports Med Date: 2022-01-22 Impact factor: 11.928
Authors: David Berrigan; Ailing Liu; Britni R Belcher; Ann Chao; Liwen Fang; Charles E Matthews; Baohua Wang; Linhong Wang; Ning Wang; Yu Wang; Lichen Yang; Martha S Linet; Nancy Potischman Journal: Int J Environ Res Public Health Date: 2020-08-26 Impact factor: 4.614
Authors: Geon Hui Kim; Bong Kil Song; Jung Woon Kim; Elizabeth C Lefferts; Angelique G Brellenthin; Duck-Chul Lee; Yu-Mi Kim; Mi Kyung Kim; Bo Youl Choi; Yeon Soo Kim Journal: PLoS One Date: 2021-08-26 Impact factor: 3.240
Authors: Robinson Ramírez-Vélez; Jorge E Correa-Bautista; Felipe Lobelo; Mikel Izquierdo; Alicia Alonso-Martínez; Fernando Rodríguez-Rodríguez; Carlos Cristi-Montero Journal: BMC Public Health Date: 2016-09-23 Impact factor: 3.295