OBJECTIVES: To determine (1) the reliability of a maximal strength test (1 repetition maximum) [1-RM] in older adults and (2) the impact of differing periods of familiarization. DESIGN: Within-subject, repeated trials of maximal strength. SETTING: Community-based senior center. PARTICIPANTS: Forty-seven independently living men (n=16) and women (n=31), with a mean age of 75.4+/-4.7 years. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Systematic error (shift in mean) and random error (% coefficient of variation [%CV]) was assessed between consecutive pairs of 1-RM trials. RESULTS: For the bench press, systematic error was virtually eliminated for men between trials 2 and 3 (0.7%; 95% confidence interval [CI], -2.7% to 4.3%). The CV was stable (4.7%-7.3%) across all trials in both genders. For the leg press, a significant but clinically small systematic error (3.6%, P<.05; 95% CI, 0.8-6.6) was evident for women between trials 2 to 3. The CV was reduced across trial pairs by 3.3% for men and 0.9% for women. Three versus 6 or more sessions of familiarization produced small clinical differences in systematic error (< or =4.1%) and CV (< or =0.2%) between trials 2 and 3 for both lifts. CONCLUSIONS: Reliability is an indispensable requirement for valid test outcomes. Our results show that, in this group of older adults, 3 familiarization sessions and 2 to 3 test trials produced highly reliable 1-RM measures. Additional periods of familiarization added little to test reliability. Effective reliability testing for 1-RM is a practical and attainable goal for outcomes based practitioners.
OBJECTIVES: To determine (1) the reliability of a maximal strength test (1 repetition maximum) [1-RM] in older adults and (2) the impact of differing periods of familiarization. DESIGN: Within-subject, repeated trials of maximal strength. SETTING: Community-based senior center. PARTICIPANTS: Forty-seven independently living men (n=16) and women (n=31), with a mean age of 75.4+/-4.7 years. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Systematic error (shift in mean) and random error (% coefficient of variation [%CV]) was assessed between consecutive pairs of 1-RM trials. RESULTS: For the bench press, systematic error was virtually eliminated for men between trials 2 and 3 (0.7%; 95% confidence interval [CI], -2.7% to 4.3%). The CV was stable (4.7%-7.3%) across all trials in both genders. For the leg press, a significant but clinically small systematic error (3.6%, P<.05; 95% CI, 0.8-6.6) was evident for women between trials 2 to 3. The CV was reduced across trial pairs by 3.3% for men and 0.9% for women. Three versus 6 or more sessions of familiarization produced small clinical differences in systematic error (< or =4.1%) and CV (< or =0.2%) between trials 2 and 3 for both lifts. CONCLUSIONS: Reliability is an indispensable requirement for valid test outcomes. Our results show that, in this group of older adults, 3 familiarization sessions and 2 to 3 test trials produced highly reliable 1-RM measures. Additional periods of familiarization added little to test reliability. Effective reliability testing for 1-RM is a practical and attainable goal for outcomes based practitioners.
Authors: Michael C Liebensteiner; Hans-Peter Platzer; Martin Burtscher; Friedrich Hanser; Christian Raschner Journal: Knee Surg Sports Traumatol Arthrosc Date: 2011-06-07 Impact factor: 4.342
Authors: Sara Butchart; Darren G Candow; Scott C Forbes; Cameron S Mang; Julianne J Gordon; Jongbum Ko; Dalton Deprez; Philip D Chilibeck; David S Ditor Journal: Int J Exerc Sci Date: 2022-08-01
Authors: Elisabet Børsheim; Quynh-Uyen T Bui; Sandrine Tissier; Hisamine Kobayashi; Arny A Ferrando; Robert R Wolfe Journal: Clin Nutr Date: 2008-03-04 Impact factor: 7.324
Authors: Joamira P Araújo; Gabriel R Neto; Jeremy P Loenneke; Michael G Bemben; Gilberto C Laurentino; Gilmário Batista; Júlio C G Silva; Eduardo D S Freitas; Maria S C Sousa Journal: Age (Dordr) Date: 2015-11-02
Authors: Melissa Daly; Meghan E Vidt; Joel D Eggebeen; W Greg Simpson; Michael E Miller; Anthony P Marsh; Katherine R Saul Journal: J Aging Phys Act Date: 2012-09-04 Impact factor: 1.961
Authors: Luanda Alves Xavier Ramos; François Talles Medeiros Rodrigues; Lívia Shirahige; Maria de Fátima Alcântara Barros; Antônio Geraldo Cidrão de Carvalho; Marcelo Renato Guerino; Ana Paula de Lima Ferreira; Ricardo Oliveira Guerra; Maria das Graças Rodrigues de Araújo Journal: J Diabetes Metab Disord Date: 2019-02-27