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      Efeitos do treinamento de resistência de força com alto número de repetições no consumo máximo de oxigênio e limiar ventilatório de mulheres Translated title: Effects of strength resistance training with high number of repetitions on maximal oxygen uptake and ventilatory threshold in women

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          Abstract

          Os efeitos do treinamento com pesos na aptidão cardiorrespiratória de mulheres não estão amplamente definidos. O estudo teve como objetivo investigar os efeitos do treinamento de resistência de força com alto número de repetições no consumo máximo de oxigênio e limiar ventilatório em mulheres jovens. Participaram deste estudo 20 mulheres, com idade de 21,2 ± 2,7 anos, agrupadas em: I - grupo de treinamento de resistência de força com alto número de repetições (GT, n = 10) e II - controle (GC, n = 10). Todas as voluntárias foram submetidas ao seguinte protocolo: antropometria, teste cardiopulmonar em esteira rolante e testes de 1RM nos exercícios: leg-press 45º, cadeira extensora, mesa flexora, supino reto, puxador costas, desenvolvimento com a barra, rosca direta e tríceps com a barra. Os testes foram realizados antes e após 12 semanas. No período proposto, os grupos realizaram: I - GT: exercícios resistidos, os mesmos dos testes de 1RM, com três séries de 25 repetições, com aproximadamente 30% de 1RM; II - GC: não realizou nenhum treinamento físico. Após 12 semanas, o GC não apresentou alterações nas variáveis estudadas (p > 0,05). O GT apresentou aumento significante da massa magra (p < 0,05) e diminuição do percentual de gordura (p < 0,01) e da gordura corporal (p < 0,01). Houve aumento dos testes de 1RM em todos os exercícios (p < 0,01) e aumento do consumo máximo de oxigênio (p < 0,05), mas não houve alteração no limiar ventilatório (p > 0,05). Conclui-se que o treinamento de resistência de força com alto número de repetições proporcionou melhora da potência aeróbia das voluntárias, evidenciado pelo aumento do consumo máximo de oxigênio, embora não tenha modificado o limiar ventilatório.

          Translated abstract

          The effects of strength training on women's cardiorespiratory capacity have not been widely established. The purpose of this study was to investigate the effects of resistance strength training with high number of repetitions on maximum oxygen uptake and ventilatory threshold in young women during 12 weeks. Twenty women, aged 21.2 + 2.7 years, were included in the study and assigned to two groups: I - resistance strength training with high number of repetitions group (TG, n = 10), and II - control group (CG, n = 10). All volunteers were submitted to the following protocol: anthropometry, cardiopulmonary testing on treadmill and 1 RM tests in the following exercises: leg-press 45º, seated leg extension, hamstring curl, bench press, lat pull-down, military press, standing barbell curls and lying barbell extension. The tests were performed before and after 12 weeks of training. Along the proposed period, the groups performed: I -TG: resistance exercises, the same of 1 RM tests, with three series of 25 repetitions, almost 30% of 1 RM; II - CG: no physical training whatsoever. CG did not show changes in the studied variables (p < 0.05). TG showed significant increase of lean mass (p < 0.05) and decrease of fat percentage (p < 0.01) and body fat (p < 0.01). There was increase in 1 RM tests in all exercises (p < 0.01) and increase of maximum oxygen uptake (p < 0.05); however, there was not change in the ventilatory threshold (p > 0.05) after 12 weeks. It is concluded that the resistance strength training with high number of repetitions improved the aerobic power of volunteers, evidenced by the increase of maximum oxygen uptake. However, the ventilatory threshold did not change.

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          Fundamentals of Resistance Training: Progression and Exercise Prescription

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            The relative benefits of endurance and strength training on the metabolic factors and muscle function of people with type 2 diabetes mellitus.

            To compare the effects of a 4-month strength training (ST) versus aerobic endurance training (ET) program on metabolic control, muscle strength, and cardiovascular endurance in subjects with type 2 diabetes mellitus (T2D). Randomized controlled trial. Large public tertiary hospital. Twenty-two T2D participants (11 men, 11 women; mean age +/- standard error, 56.2+/-1.1 y; diabetes duration, 8.8+/-3.5 y) were randomized into a 4-month ST program and 17 T2D participants (9 men, 8 women; mean age, 57.9+/-1.4 y; diabetes duration, 9.2+/-1.7 y) into a 4-month ET program. ST (up to 6 sets per muscle group per week) and ET (with an intensity of maximal oxygen consumption of 60% and a volume beginning at 15 min and advancing to a maximum of 30 min 3x/wk) for 4 months. Laboratory tests included determinations of blood glucose, glycosylated hemoglobin (Hb A1c), insulin, and lipid assays. A significant decline in Hb A1c was only observed in the ST group (8.3%+/-1.7% to 7.1%+/-0.2%, P=.001). Blood glucose (204+/-16 mg/dL to 147+/-8 mg/dL, P<.001) and insulin resistance (9.11+/-1.51 to 7.15+/-1.15, P=.04) improved significantly in the ST group, whereas no significant changes were observed in the ET group. Baseline levels of total cholesterol (207+/-8 mg/dL to 184+/-7 mg/dL, P<.001), low-density lipoprotein cholesterol (120+/-8 mg/dL to 106+/-8 mg/dL, P=.001), and triglyceride levels (229+/-25 mg/dL to 150+/-15 mg/dL, P=.001) were significantly reduced and high-density lipoprotein cholesterol (43+/-3 mg/dL to 48+/-2 mg/dL, P=.004) was significantly increased in the ST group; in contrast, no such changes were seen in the ET group. ST was more effective than ET in improving glycemic control. With the added advantage of an improved lipid profile, we conclude that ST may play an important role in the treatment of T2D.
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              Effects of intra-session concurrent endurance and strength training sequence on aerobic performance and capacity.

              To examine the effects of the sequencing order of individualised intermittent endurance training combined with muscular strengthening on aerobic performance and capacity. Forty eight male sport students (mean (SD) age 21.4 (1.3) years) were divided into five homogeneous groups according to their maximal aerobic speeds (vV*o2max). Four groups participated in various training programmes for 12 weeks (two sessions a week) as follows: E (n = 10), running endurance training; S (n = 9), strength circuit training; E+S (n = 10) and S+E (n = 10) combined the two programmes in a different order during the same training session. Group C (n = 9) served as a control. All the subjects were evaluated before (T0) and after (T1) the training period using four tests: (1) a 4 km time trial running test; (2) an incremental track test to estimate vV*o2max; (3) a time to exhaustion test (t(lim)) at 100% vV*o2max; (4) a maximal cycling laboratory test to assess V*o2max. Training produced significant improvements in performance and aerobic capacity in the 4 km time trial with interaction effect (p < 0.001). The improvements were significantly higher for the E+S group than for the E, S+E, and S groups: 8.6%, 5.7%, 4.7%, and 2.5% for the 4 km test (p < 0.05); 10.4%, 8.3%, 8.2%, and 1.6% for vV*o2max (p < 0.01); 13.7%, 10.1%, 11.0%, and 6.4% for V*o2max (ml/kg(0.75)/min) (p < 0.05) respectively. Similar significant results were observed for t(lim) and the second ventilatory threshold (%V*o2max). Circuit training immediately after individualised endurance training in the same session (E+S) produced greater improvement in the 4 km time trial and aerobic capacity than the opposite order or each of the training programmes performed separately.
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                Author and article information

                Journal
                rbme
                Revista Brasileira de Medicina do Esporte
                Rev Bras Med Esporte
                Sociedade Brasileira de Medicina do Exercício e do Esporte (São Paulo, SP, Brazil )
                1517-8692
                1806-9940
                December 2008
                : 14
                : 6
                : 513-517
                Affiliations
                [02] São Paulo orgnameUniversidade Metodista de Piracicaba orgdiv1Faculdade de Ciências Exatas e da Natureza Brasil
                [01] São Paulo orgnameUniversidade Metodista de Piracicaba orgdiv1Faculdade de Ciências da Saúde orgdiv2Curso de Educação Física Brasil
                Article
                S1517-86922008000600008 S1517-8692(08)01400608
                10.1590/S1517-86922008000600008
                7ca929e8-808a-4fae-a47a-ad1259f3e9dd

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 19 October 2007
                : 05 July 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 30, Pages: 5
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                SciELO Brazil

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                Artigos Originais

                força muscular,exercício físico,variáveis cardiorrespiratórias,avaliação,physical exercise,cardiorespiratory variables,assessment,muscle strength

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