Autor(es): Nascimento, Matheus A. [UNESP] ; Silva, Danilo R. P. ; Ribeiro, Alex S. ; Pina, Fabio L. C. ; Gerage, Aline M. ; Gobbo, Luis A. [UNESP] ; Mayhew, Jerry L. ; Cyrino, Edilson S.
Data: 2020
Identificador Persistente: http://hdl.handle.net/11449/196960
Origem: Oasisbr
Assunto(s): DXA; BIA; strength training; BMI
Made available in DSpace on 2020-12-10T20:01:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-06-01
Nascimento, MA, Silva, DRP, Ribeiro, AS, Pina, FLC, Gerage, AM, Gobbo, LA, Mayhew, JL, and Cyrino, ES. Agreement between bioelectrical impedance and dual-energy x-ray absorptiometry to track changes in fat-free mass after resistance training in older women. J Strength Cond Res 34(6): 1700-1708, 2020-The aim of our study was to compare the agreement between bioelectrical impedance (BIA) and dual-energy X-ray absorptiometry (DXA) to track changes on fat-free mass (FFM) after a resistance training (RT) program in older women. Forty-three older women (65.2 +/- 4.6 years, 59.5 +/- 9.2 kg, 156.4 +/- 6.0 cm, 24.3 +/- 3.3 kg center dot m(-2)) participated in a RT intervention (12 weeks, 8 exercises, 2 sets, 10-15 repetitions, 3 nonconsecutive days per week). Fat-free mass changes were determined by a single-frequency BIA device (EQ1), 6 BIA prediction equations for older women (EQ2, EQ3, EQ4, EQ5, EQ6, and EQ7), and DXA. At pretraining, 3 equations overpredicted, and 3 underpredicted DXA FFM (F = 244.63, p < 0.001), although all equations had high correlations with DXA (r = 0.78-0.83). After training, 4 equations overpredicted and one underpredicted DXA FFM (F = 176.25, p < 0.001). Dual-energy X-ray absorptiometry detected significant gains in FFM (0.65 +/- 0.82 kg; p < 0.05), as did EQ3 (0.55 +/- 1.69 kg; p < 0.05), and EQ4 (0.61 +/- 1.88 kg; p < 0.05), whereas the remaining equations did not indicate significant changes in FFM. Low correlations between FFM and equation change values suggest that single-frequency BIA-derived equations may not provide sufficient accuracy to track changes in FFM after 12 weeks of RT in older women.
Parana State Univ UNESPAR, Paranavai, Parana, Brazil
Univ Estadual Londrina, Phys Educ & Sport Ctr, Metab Nutr & Exercise Lab, Londrina, Parana, Brazil
Univ Northern Parana UNOPAR, Ctr Res Hlth Sci, Londrina, Parana, Brazil
Univ Fed Santa Catarina, Dept Phys Educ, Florianopolis, SC, Brazil
Sao Paulo State Univ, Sch Technol & Sci, Dept Phys Educ, Presidente Prudente, SP, Brazil
Truman State Univ, Exercise Sci Dept, Kirksville, MO USA
Parana State Univ UNESPAR, Paranavai, Parana, Brazil
Sao Paulo State Univ, Sch Technol & Sci, Dept Phys Educ, Presidente Prudente, SP, Brazil
