Resumo-O objetivo deste estudo foi analisar o número de repetições sustentadas até a falha concêntrica, em séries múltiplas de exercícios com pesos. Três séries a 70% de 1-RM foram executadas por 17 homens (28,0 ± 5,1 anos), nos exercícios supino em banco horizontal, agachamento, rosca direta, cadeira extensora e mesa flexora, com dois minutos de recuperação entre as séries e cinco minutos entre os exercícios. Um maior número total de repetições (p < 0,05) foi identificado nos exercícios multiarticulares (33 repetições) em relação aos exercícios monoarticulares (24 a 28 repetições). Uma redução significante no desempenho (p < 0,05) foi encontrada entre a primeira e a segunda série (28 a 35%) e entre a segunda e a terceira série (22 a 36%). Os resultados sugerem que o desempenho motor não é sustentado em séries múltiplas a 70% de 1-RM em exercícios monoarticulares e multiarticulares, com intervalos de recuperação de dois minutos.Palavras-chaves: resistência de força, fadiga muscular, força muscular, testes motores Abstract-"Motor performance in sustained multiple weight exercises to concentric failure." The aim of this study was to analyze the number of repetitions to concentric failure sustained in multiple sets of weight exercises. Three sets of 1-RM were performed by 17 men (28.0 ± 5.1 years) in bench press, squat, arm curl, leg extension, and leg curl exercises, with rest period of 2-min between sets and 5-min between exercises. A larger number of total repetitions (p < 0.05) was identified in multiple-joint (33 repeats) compared to single-joint exercises (24 to 28 repetitions). A significant reduction in performance (p < 0.05) was found between the first and second set (28 to 35) and between the second and third set (22 to 36). The results suggest that the motor performance is not sustained in multiple sets the 70% of 1-RM in single-and multiple-joint exercises, with rest periods of 2-min.Keywords: strength endurance, muscular fatigue, muscular strength, motor tests Resumen-"Desempeño motor en series múltiples hasta la falla concéntrica." El objetivo de este estudio fue analizar el número de repeticiones sostenidas hasta la falla concéntrica en series múltiples de ejercicios con pesas. Tres series a 70% de 1-RM fueron ejecutadas por 17 hombres (28.0 ± 5,1 años), en los ejercicios press de banco, sentadilla, curl con barra in pie, extensión de piernas y curl de piernas tendido, con dos minutos de descanso entre as series y cinco minutos entre el ejercicios. Un mayor número de repeticiones (p < 0.05) fue identificado en el ejercicios multiarticulares (33 repeticiones) en comparación con monoarticulares (24 a 28 repeticiones). Una reducción significativa en el desempeño (p < 0.05) fue encontrado entre la primera y segunda serie (28 a 35) y entre la segunda y tercera serie (22 a 36). Los resultados sugieren que el desempeño motor no se sustenta en series múltiples a 70% de 1-RM en ejercicios monoarticulares y multiarticulares, con intervalos de dos minutos de recuperación.Palabras claves: resistencia a la fuerza...
This study investigated the correlation between post-exercise hypotension (PEH) and chronic blood pressure (BP) reduction in older women after a resistance training (RT) program. Methods: Twenty-five older women (≥60 years) performed a RT program for 8 weeks, 3x/week consisting of 3 sets of 8-12 repetitions maximum in 8 exercises. Acute and chronic BP measurements were performed using automatic equipment, in which acute BP was measured before and after 10, 20, 30, 40, 50 and 60 min following the sixth exercise session, while chronic BP was measured pre and post-training. Results: Significant decrease for systolic blood pressure (SBP) was observed after the intervention period, however, the diastolic blood pressure (DBP) did not change. To acute changes in BP, SBP decreased at all times after a single RT session, while DBP increased after 40 min. The reduction for SBP after a single RT session at baseline showed positive and significant correlations with the reductions in basal SBP observed after the 8 weeks of RT, the strongest correlations were observed at 20 min. A linear relationship between the magnitude of change in chronic SBP and the 20 min for acute SBP, and 30 min for acute DBP of post-exercise was observed. Conclusion: The results suggest that acute BP lowering after RT session is a reliable predictor of chronic BP response to exercise training, and 20 min of resting, after RT training, is enough to indicate chronic response of BP as this measure was highly associated with chronic BP lowering in older women.
BACKGROUND: Differences related to sexual characteristics are directly linked to the mechanisms responsible for adaptations from resistance training (RT). Due to these differences, men and women may perform their RT programs at different percentages of maximum strength even when executing the same number of repetitions. OBJECTIVE: To compare the relative repetition maximum (%1RM) at which men and women perform RT in a program controlling repetitions/set. METHODS: Thirty men (22.7 ± 4.4 years, 68.4 ± 9.0 kg, 174.5 ± 6.6 cm), and 34 women (22.7 ± 4.1 years, 58.8 ± 11.9 kg, 162.6 ± 6.2 cm) performed 16 weeks of RT, 3 times per week using 3 sets of 8-12 RM. Anthropometric measurements and 1RM test in bench press (BP), and arm curl (AC) were obtained at baseline and after the RT program. RESULTS: Women performed the training in BP at a higher %1RM than men (P < 0.05) at the beginning (men = 59.8 ± 5.1% and women = 63.2 ± 7.2%) and at the end (men = 66.2 ± 6.5% and women = 68.6 ± 7.2%) of the program. Both men and women significantly increased (P < 0.05) the %1RM at which they performed BP exercise (men = +10.7% and women = +8.5%) while maintaining the 8-12 repetition configuration with no significant time x group interaction (P > 0.05). There was not significant main effect for AC (P > 0.05) indicating no change in %1RM at which each sex exercised. CONCLUSION: We conclude that men and women perform RT at different %1RM in BP, except for the AC during a RT program utilizing 8-12 RM per set.
O objetivo do estudo foi descrever o perfil de risco cardiovascular (RCV) de mulheres adultas triadas para participação de um programa de exercício físico. Foram avaliadas 409 mulheres, com idade entre 20 e 59 anos. Seguiu-se a recomendação de triagem e estratificação do RCV proposta pelo Colégio Americano de Medicina Esportiva por meio da aplicação de um questionário face a face que identificou o Risco Alto (RA) pela presença de doença cérebro-cardiovascular ou sintomas de instabilidade cardíaca, Risco Moderado pela presença de três ou mais fatores de risco e o Risco Baixo pela presença de até dois fatores de risco para mulheres com idade inferior a 55 anos. Entretanto, para atender ao desfecho primário do estudo (prevalência do alto risco) foram agrupadas as categorias de risco baixo e moderado (RBM). A frequência das mulheres para o RA foi de 35,2%, sendo: 22,9% cardiopatas, 56,9% apresentavam dispneia, 45,1% vertigem e 32,6% dor no peito. A frequência de mulheres classificadas como RBM, foi de 64,8%. O fator de risco mais prevalente foi a obesidade, sendo 47,5% no RBM e 61,8% no RA, seguido da hipertensão para o RA (43,1%). Houve correlação entre RA e hipertensão (r=0,193; p<0,01); diabetes (r=0,108; p<0,05); obesidade (r=0,158; p<0,01) e sintomatologia climatérica (r=0,150; p<0,01). Para o RA, não houve diferença estatisticamente significante na proporção de mulheres que se autodeclaram hipertensas (χ²=0,071; p>0,05) e diabéticas (χ²= 0,500; p>0,05). Entretanto, houve diferença significante em favor de uma maior proporção de mulheres obesas e que foram classificadas na condição cardiovascular de RA (χ²= 6,367; p =0,01). Em conclusão, há grande prevalência de mulheres classificadas como RA, reforçando a importância da triagem pré-participação ao exercício.
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