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      Efeito de 12 semanas de treinamento com pesos sobre a força muscular, composição corporal e triglicérides em homens sedentários Translated title: 12-week resistance training effect on muscular strength, body composition and triglycerides in sedentary men

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          Abstract

          O objetivo do presente estudo foi verificar o efeito de 12 semanas de treinamento com pesos (TP) sobre a força muscular, composição corporal e triglicérides em homens sedentários. Para tanto, 14 homens saudáveis e sedentários foram separados aleatoriamente, de forma balanceada, em grupo experimental (GE = 29 ± 1 anos; 180,0 ± 3,0cm; 80,5 ± 1,8kg) e grupo controle (GC = 27 ± 1 anos; 170,0 ± 2,0cm; 76,2 ± 0,9kg). O GE foi submetido a um protocolo de TP durante 12 semanas, com frequência de três vezes por semana. O programa de TP foi composto por 10 exercícios executados em duas séries de 10-20 repetições. Medidas de massa corporal, estatura, espessura de dobras cutâneas e triglicérides foram realizadas antes e após o período de intervenção. Adicionalmente, o teste de uma repetição máxima (1RM) foi aplicado nos exercícios supino em banco horizontal e mesa extensora, nos período pré, após seis e 12 semanas de acompanhamento. Foram encontradas diferenças significativas (P < 0,05) após as 12 semanas de TP apenas no GE para o somatório das dobras cutâneas, ao passo que a massa corporal e os triglicérides não sofreram alterações nesse período. Com relação aos valores de força muscular, identificou-se aumento significativo (P < 0,05) no GE em ambos os exercícios entre o primeiro e o segundo teste de 1RM e entre o segundo e o terceiro. Conclui-se, portanto, que 12 semanas de TP foram suficientes para aumentar a força muscular e reduzir o somatório de dobras cutâneas sem, contudo, alterar os valores de triglicérides e massa corporal.

          Translated abstract

          The purpose of this study was to investigate the effect of 12 weeks of resistance training on muscle strength, body composition and triglycerides in sedentary men. Fourteen healthy men were randomly divided into experimental (EG = 29 ± 1 yrs; 180.0 ± 3.0 cm; 80.5 ± 1.8 kg) and control (CG = 27 ± 1 yrs; 170.0 ± 2.0 cm; 76.2 ± 0.9 kg) groups. The EG subjects participated in a resistance training protocol during 12 weeks, three times per week. The program of resistance training included 10 exercises performed in two sets of 10-20 repetitions. Body mass, height, skinfold thickness and triglycerides were measured before and after the 12 weeks of intervention. One maximal repetition test (1RM) was done to measure muscle strength. Significant differences (P<0.05) were observed on the sum of skinfolds only in EG after the resistance training, while body mass and triglycerides did not change in neither groups. Muscle strength increased (P<0.05) in both exercises performed between the first and the second and between the second and the third 1-RM tests. Therefore, 12 weeks of resistance training were enough to improve muscle strength and sum of skinfolds, but without promoting any changes in triglycerides and body mass.

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          Resistance exercise in individuals with and without cardiovascular disease: 2007 update: a scientific statement from the American Heart Association Council on Clinical Cardiology and Council on Nutrition, Physical Activity, and Metabolism.

          Prescribed and supervised resistance training (RT) enhances muscular strength and endurance, functional capacity and independence, and quality of life while reducing disability in persons with and without cardiovascular disease. These benefits have made RT an accepted component of programs for health and fitness. The American Heart Association recommendations describing the rationale for participation in and considerations for prescribing RT were published in 2000. This update provides current information regarding the (1) health benefits of RT, (2) impact of RT on the cardiovascular system structure and function, (3) role of RT in modifying cardiovascular disease risk factors, (4) benefits in selected populations, (5) process of medical evaluation for participation in RT, and (6) prescriptive methods. The purpose of this update is to provide clinicians with recommendations to facilitate the use of this valuable modality.
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            Clinical Guidelines on the Identification, Evaluation; Treatment of Overweight and Obesity in Adults—The Evidence Report

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              Combined aerobic and resistance exercise improves glycemic control and fitness in type 2 diabetes.

              We investigated the effect of an 8 week circuit training (CT) program, combining aerobic and resistance exercise, on indices of glycemic control, cardiorespiratory fitness, muscular strength and body composition in 16 subjects (age 52 +/- 2 years) with type 2 diabetes using a prospective randomised crossover protocol. Submaximal exercise heart rate and rate pressure product were significantly lower after training (P<0.05), whilst ventilatory threshold increased (11.8 +/- 0.7 vs 13.8 +/- 0.6 ml kg(-1)min(-1), P<0.001). Muscular strength also increased with training (403 +/- 30 to 456 +/- 31 kg, P<0.001), whilst skinfolds (148.7 +/- 11.5 vs 141.1 +/- 10.7 mm, P<0.05), % body fat (29.5 +/- 1.0 vs 28.7 +/- 1.1%, P<0.05) and waist:hip ratio (99.2 +/- 1.5 vs 97.9 +/- 1.4%, P<0.05) significantly decreased. Concurrently, peak oxygen uptake (P<0.05) and exercise test duration (P<0.001) increased following training, whilst glycated hemoglobin (P<0.05) and fasting blood glucose (P<0.05) decreased. CT is an effective method of training that improved functional capacity, lean body mass, strength and glycemic control in subjects with type 2 diabetes.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rbme
                Revista Brasileira de Medicina do Esporte
                Rev Bras Med Esporte
                Sociedade Brasileira de Medicina do Exercício e do Esporte (São Paulo )
                1806-9940
                February 2010
                : 16
                : 1
                : 29-32
                Affiliations
                [1 ] Universidade Estadual de Londrina Brazil
                [2 ] Universidade Estadual de Londrina Brazil
                [3 ] Universidade Norte do Paraná Brazil
                Article
                S1517-86922010000100005
                10.1590/S1517-86922010000100005
                79f8ca88-6ac0-459e-a40f-5f5bd1ec2d24

                http://creativecommons.org/licenses/by/4.0/

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                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=1517-8692&lng=en
                Categories
                PHYSIOLOGY
                SPORT SCIENCES

                Sports medicine,Anatomy & Physiology
                strength training,plasma triglycerides,body fat percentage,treinamento de força,triglicéride plasmático,percentual de gordura

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