| Autor: |
Neves RVP; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Rosa TS; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil.; Graduate Program in Exercise Physiology, Ibirapuera University, São Paulo, Brazil., Souza MK; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Oliveira AJC; Physical Education School, University Center Estácio, Brasília, Brazil., Gomes GNS; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Brixi B; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Souza LHR; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil.; Physical Education, State of Bahia University (UNEB) - DEDC/XII Campus, Guanambi, Brazil., Deus LA; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Simões HG; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Stone WJ; School of Nutrition, Kinesiology, and Psychological Sciences, University of Central Missouri, Warrensburg, MO, United States., Prestes J; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil., Moraes MR; Graduate Program in Physical Education, Catholic University of Brasília, Brasília, Brazil. |
| Abstrakt: |
This study aimed to compare the effects of dynamic (DRT) and isometric (IRT) resistance training on blood glucose, muscle redox capacity, inflammatory state, and muscle strength and hypertrophy. Fifteen 12-week-old male Wistar rats were randomly allocated into three groups: control group (CTL), DRT, and IRT, n = 5 animals per group. The animals were submitted to a maximal weight carried (MWC; every 15 days) and maximum isometric resistance (MIR; pre- and post-training) tests. Both training protocols were performed five times a week during 12 weeks, consisting of one set of eight uninterrupted climbs for 1 min with a 30% overload of MWC. The animals in the IRT group remained under isometry for 1 min. The DRT group experienced greater MWC from pre- to post-training compared to the CTL and IRT groups ( p < 0.0001). The DRT and IRT groups displayed similar gains in MIR ( p = 0.3658). The DRT group exhibited improved glycemic homeostasis ( p = 0.0111), redox ( p < 0.0001), and inflammatory ( p < 0.0001) balance as compared with CTL and IRT groups. In addition, the improved glycemic profile was associated with an increase in muscle strength and hypertrophy, improvement in redox balance and inflammation status. We conclude that DRT was more effective than IRT on increasing cross-sectional area, but not muscle strength, in parallel to improved blood glucose, inflammatory status, and redox balance. |
