Acylated Ghrelin and Circulatory Oxidative Stress Markers Responses to Acute Resistance and Aerobic Exercise in Postmenopausal Women.

BACKGROUND: Since exercise increases the production of reactive oxygen species in different tissues, the objective of this study is to evaluate, compare and correlate the acute effects of aerobic and resistance exercise in circulatory markers of oxidative stress and acylated ghrelin (AG) in postmenopausal women. METHODS: Ten postmenopausal women completed different protocols: a control session (CON), an aerobic exercise session (AERO); and a single-set (SSR) or 3-set (MSR) resistance exercise protocol. RESULTS: After exercise, both MSR (P = .06) and AERO (P = .02) sessions showed significant increased lipid peroxidation compared with baseline levels. CON and SSR sessions showed no differences after exercise. No differences were found between sessions at any time for total glutathione, glutathione dissulfide or AG concentrations. CONCLUSIONS: Exercise significantly increased lipid peroxidation compared with baseline values. As pro oxidant stimuli is necessary to promote chronic adaptations to the antioxidant defenses induced by exercise, our findings are important to consider when evaluating exercise programs prescription variables aiming quality of life in this population.

High-volume resistance training reduces postprandial lipaemia in postmenopausal women.

The aim of this study was to compare the effects of 11 weeks of low-volume resistance training (LVRT) and high-volume resistance training (HVRT) on muscle strength, muscle thickness (MT), and postprandial lipaemia (PPL) in postmenopausal women. Thirty-six healthy and untrained postmenopausal women (age, 58.9 ± 5.8 years; 68.6 ± 10.3 kg; and BMI, 26.9 ± 4.8 kg · m(-2)) participated in resistance training 3× per week for 11 weeks (HVRT = 12; LVRT = 13; and control group = 11). Biochemical variables, both pretraining and post-training, were evaluated 16 h after the administration of an oral fat tolerance test (OFTT) and metabolic variable during [energy expenditure (EE)] and after training session [excess postexercise oxygen consumption (EPOC)]. Muscle strength (1 RM) and MT were also calculated, and no significant differences were observed between the groups for PPL (mmol · L(-1) per 5 h) as measured by glucose, high-density lipoprotein, low-density lipoprotein, and total cholesterol. EE total (EE + EPOC; 6.12 ± 1.21 MJ vs. 2.26 ± 0.85 MJ), resting fat oxidation (5.52 ± 1.69 g · h(-1) vs. 4.11 ± 1.12 g · h(-1)); MT (vastus medialis, 21.4 ± 1.8 mm vs. 18.4 ± 1.2 mm and vastus lateralis 22.3 ± 1.2 mm vs. 20.8 ± 1.3 mm); triacylglycerol (TAG) 0, 1, 2, 4; and 5 h after OFTT, TAG area under the curve (AUC) (5.79 ± 0.42 vs. 7.78 ± 0.68), and incremental AUC (-46.21 ± 14.42% vs. 7.78 ± 4.68%) were all significantly different post-training for HVRT versus LVRT, respectively (P < 0.05). The results of this investigation suggest that HVRT reduces PPL in postmenopausal women.

Effects of strength training on blood lipoprotein concentrations in postmenopausal women / Efeitos do treinamento de força sobre as concentrações de lipoproteínas sanguíneas em mulheres pós-menopausa

Strength training is often identified as a contributing factor in prevention of diseases and as a non-pharmacological treatment for metabolic disorders and for control of body mass. Its protective effects and utility for management of disease are amplified in people at risk of diabetes mellitus and dyslipidemias, and cardiovascular diseases (CVD). Recently the benefits of strength training have been used to reduce the risk of these diseases emerging in postmenopausal women, who are at greater risk of CVD than men of the same age. Notwithstanding, little is known about the effects of strength training on metabolism of blood lipoproteins. The objective of this review was to compare the results of articles that have investigated the effects on lipoprotein concentrations of strength training in postmenopausal women. Current articles dealing with the subject, with publication dates from 1979 to 2012 and large numbers of citations by well-known researchers were identified on the Pubmed, Scopus and EBSCO databases. It was concluded that strength training possibly has an action that affects lipoprotein metabolism and concentrations in postmenopausal women.

O treinamento de força tem sido frequentemente relacionado como contribuinte para a prevenção do aparecimento de doenças e como tratamento não farmacológico para distúrbios metabólicos e controle de massa corporal. Os efeitos protetores e de manejo de doenças se ampliam para sujeitos com riscos para diabetes mellitus e dislipidemias, e doenças cardiovasculares (DCV). Recentemente, os benefícios do treinamento de força têm sido usados para reduzir o risco do aparecimento dessas doenças em mulheres pós-menopausa, as quais apresentam um risco maior para desenvolver DCV quando comparadas aos homens de mesma idade. Entretanto, pouco se sabe sobre a efetividade do treinamento de força sobre metabolismo das lipoproteínas sanguíneas. O objetivo desta revisão foi comparar os resultados de artigos que abordaram os efeitos do treinamento de força em mulheres pós-menopausa e quais os resultados sobre as concentrações de lipoproteínas. Foram pesquisadas referências atuais sobre o tema a ser abordado, sendo que os artigos foram selecionados nas bases de dados Pubmed, Scopus e EBSCO, artigos atuais datados do período de 1979 a 2012, com grande número de citações de pesquisadores renomados no assunto. Em conclusão, o treinamento de força possivelmente tenha uma ação efetiva no metabolismo e na concentração de lipoproteínas em mulheres pós-menopausa.

Inflammatory markers, endothelial function and cardiovascular risk / Marcadores inflamatórios, função endotelial e riscos cardiovasculares

The need to study cardiovascular diseases (CVD) has become more and more relevant as their prevalence has increased over the years. An intact endothelial wall is essential to vascular health. Certain factors are responsible for maintaining this tissue intact, including nitric oxide (NO), which provokes dilation of blood vessels in response to shear stress. Expression of the endothelial nitric oxide synthase (eNOS) enzyme, which produces nitric oxide in response to increases in blood flow, is of fundamental importance to maintenance of the vascular system. When this enzyme is inhibited, nitric oxide production is reduced, causing endothelial dysfunction. Since C-reactive protein inhibits production of nitric oxide by the eNOS enzyme, it is one of the causes of endothelial dysfunction and cardiovascular events. The objective of the present study was to review scientific articles in the literature related to the subject 'inflammatory markers and endothelial function'. A wide-ranging review of the current literature was conducted, using systematic analysis of bibliographic references indexed in PubMed, Scielo, Medline and LILACS database, for the years 1992 to 2013. The studies reviewed show that increases in inflammation causes reductions in NO and increases in cardiovascular events. Increased inflammation is associated with higher incidence of cardiovascular diseases...

A necessidade de estudo das Doenças Cardiovasculares (DCV) vem à tona pelo aumento da sua prevalência ao longo dos anos. Uma parede endotelial íntegra é essencial para a saúde vascular. Alguns fatores são responsáveis pela integridade deste tecido, como o óxido nítrico (NO), que provoca a dilatação do vaso sanguíneo em resposta ao estresse de cisalhamento. A expressão da enzima óxido nítrico sintase endotelial (eNOS), que produz óxido nítrico em resposta ao incremento do fluxo sanguíneo, é fundamental para a manutenção do sistema vascular. Quando há inibição desta enzima, ocorre diminuição da produção de óxido nítrico, causando disfunção endotelial. A PCR inibe a produção de óxido nítrico pela enzima eNOS, sendo então uma causadora de disfunção endotelial e eventos cardiovasculares. O presente artigo tem como objetivo revisar artigos científicos na literatura relacionados ao tema 'marcadores inflamatórios e função endotelial'. Foi realizada uma ampla revisão de literatura atual, utilizando-se análise sistemática das referências bibliográficas nas bases de dados PubMed, Scielo, Medline e Lilacs, no período de 1992 a 2013. Os estudos revisados mostram que o aumento da inflamação causa uma diminuição de NO e aumento de eventos cardiovasculares. O aumento da inflamação está associado ao aumento da incidência de doenças cardiovasculares...

Postprandial lipemia and cardiovascular diseases: the beneficial role of strength exercise / Lipemia pós-prandial e doenças cardiovasculares: o papel benéfico dos exercícios de força

Development of cardiovascular diseases (CVD) has been linked with changes to the lipid profile that can be observed during the postprandial period, a phenomenon known as postprandial lipemia (PL). Physical exercise is currently the number one non-pharmacological intervention employed for prevention and reduction of risk factors for the development of CVD. This in turn has created a growing interest in the effects of physical exercise on regulation and equilibrium of lipid metabolism. In this review we compare the results of studies that have investigated the beneficial effects of strength training on PL. We analyzed articles identified in the PubMed, Scopus and EBSCO databases published from 1975 to 2013 in international journals. Studies were selected for review if they covered at least two of four keywords. The results of these studies lead to the conclusion that strength training is effective for reduction of postprandial lipemia because it increases baseline energy expenditure. This type of training can be prescribed as an important element in strategies to treat chronic diseases, such as atherosclerosis...

O desenvolvimento de doenças cardiovasculares (DCV) tem sido associado a alterações no perfil lipídico encontradas no período pós-prandial, fenômeno conhecido como lipemia pós-prandial (PL). O exercício fisico é atualmente a principal intervenção não farmacológica utilizada na prevenção e na redução de fatores de risco para o desenvolvimento de DCV. Por esta razão, há um interesse crescente acerca dos efeitos do exercício físico sobre a regulação e o equilíbrio do metabolismo lipídico. Nesta revisão, procuramos comparar os resultados de artigos que abordaram os efeitos benéficos do treinamento de força sobre a PL. Utilizamos artigos que foram selecionados nas bases de dados PubMed, Scopus e EBSCO, no período entre os anos 1975 e 2013, e publicados em revistas internacionais. Os estudos selecionados foram aqueles que contemplassem pelo menos duas das quatro palavras-chave do estudo. Com base nos estudos selecionados, conclui-se que o treinamento de força revela-se eficaz na redução da lipemia pós-prandial por induzir uma melhoria da demanda de energia basal. Este tipo de treinamento pode ser indicado como uma estratégia importante para o tratamento de doenças crônicas, como a aterosclerose...

Resistance exercise at variable volume does not reduce postprandial lipemia in postmenopausal women.

The aim of this study was to investigate the acute effects of resistance exercise sessions (RESs) performed at different levels of high-volume resistance exercise (HVRE) and low-volume resistance exercise (LVRE) on postprandial lipemia (PPL) in postmenopausal women. Thirty-nine healthy unconditioned postmenopausal women (59.5 ± 4.8 years of age, body mass 69.6 ± 9.1 kg, height 157.9 ± 7.2 cm, BMI 27.6 ± 4.1 kg m(-2), waist circumference 76.1 ± 9.7 cm, VO2max 18.7 ± 1.4 mL kg(-1) min(-1)) were assigned to a LVRE (n = 12), HVRE (n = 14), and control group (CG, n = 13). Experimental groups performed one RES involving eight exercises. The HVRE group performed three sets with a maximum of 15 repetitions, and the LVRE group performed one set with a maximum of 15 repetitions. Approximately 16 h after a RES, all of the groups were given an oral fat tolerance test (OFTT). During the RES, we evaluated the energy expenditure (EE) of the resistance session and excess postexercise oxygen consumption (EPOC); following the RES and the OFTT, we evaluated lipid profiles (total cholesterol, HDL, LDL, and triglycerides). While the study groups did not demonstrate significant differences in lipid profiles, the total energy expenditure (EE + EPOC) of the session exercise treatments was significantly higher for HVRE than for LVRE (0.60 ± 0.12 and 0.31 ± 0.11 MJ, respectively, p < 0.001). Different levels of resistance exercise do not lower basal triglyceride concentration and postprandial lipid profile parameters at approximately 16 h following resistance exercise in untrained postmenopausal women.

Short-term strength training improves muscle quality and functional capacity of elderly women.

To assess effects of a short-term strength training (ST) program on muscle quality (MQ) and functional capacity, 36 sedentary elderly women (age = 66.0 ± 8 year, height = 159.1 ± 9.2 cm, body mass = 68.3 ± 12.1 kg, body fat = 37.0 ± 4.2 %) were randomly divided into an experimental group (EG; n = 19) or a control group (CG; n = 17). The EG performed two to three sets of 12-15 repeats of leg press, knee extension, and knee flexion exercises, 2 days/week for 6 weeks. Before and after training, lower body one repetition maximum (1RM), functional performance tests, quadriceps femoris muscle thickness (MT), and muscle quality (MQ) (1RM and quadriceps MT quotient) were assessed. After training, only the EG showed significant improvements in 1RM (p < 0.05), 30-s sit-to-stand (p < 0.001), and 8 foot up-and-go (p < 0.001). In addition, only in the EG, significant increases in all quadriceps femoris MT measurements (vastus lateralis, vastus medialis, vastus intermedius, and rectus femoris) (p ≤ 0.05), and MQ (p < 0.001) were demonstrated. No changes were observed in the CG. Furthermore, there were significant associations between individual changes in MQ and corresponding changes in 30-s sit-to-stand (r = 0.62, p < 0.001), and 8 foot up-and-go (r = -0.71, p < 0.001). In conclusion, a ST program of only 6 weeks was sufficient to enhance MQ of the knee extensors in elderly women, which resulted in beneficial changes in functional capacity.

Avaliação funcional em idosas: uma proposta metodológica / Functional assessment in elderly: a methodological proposal

O objetivo do presente estudo consistiu em verificar se as alterações no desempenho no teste de salto com contra movimento (CMJ) estão associadas aos incrementos obtidos nos testes para avaliação da capacidade funcional. Para a avaliação da capacidade funcional, realizaram-se os testes 1RM, sentar e levantar e 8 foot up and go, após seis semanas de treinamento de força. A amostra voluntária foi constituída por 59 idosas saudáveis e destreinadas, divididas em grupo controle (GC: n=17) e experimental (GE: n=42). O GE obteve incrementos significativos nos testes CMJ (22,5%) 1RM (21,5%), sentar e levantar (22,8%) e 8 foot up and go (24%). No GE, incrementos nos valores do CMJ correlacionaram-se significativamente (p<0,001) com os incrementos nos testes de 1RM (r=0,88), sentar e levantar (r=0,82) e 8 foot up and go (r=-0,75); e apresentaram diferenças significativas (p<0,05) em relação ao GC em todas as variáveis. Sendo assim, é possível sugerir a utilização do CMJ como indicador de funcionalidade em mulheres idosas, visto que o teste parece representar adequadamente as alterações funcionais decorrentes de um período de treinamento de força de seis semanas em mulheres idosas.

This study aimed to verify whether changes in performance in the countermovement jump test (CMJ) are associated with the improvements observed in the functional capacity tests. Methods: Functional capacity was measured with the 1RM, the 30 seconds chair-standing and the 8 foot up and go tests, after six weeks of strength training. The voluntary sample was comprised of 59 healthy untrained elderly women, who were randomly divided into experimental (EG = 42) and control groups (CG = 17). The EG showed a statistically significant increase in the CMJ (22.5%), 1RM (21.5%), 30 seconds chair-standing (22.8%) and 8 foot up and go (24%) results. The increases observed in the CMJ test showed a very high significant association (p <0.001) with the increases observed in the functional capacity tests: 1RM test (r = 0.88), 30 seconds chair-standing test (r = 0.82), and 8 foot up and go test (r = -0.75). Such increases were not seen in the CG. Results suggest that CMJ is a good test for measuring functional capacity in elderly women. The CMJ test seems to adequately express the changes in functional capacity observed over a six-week period of strength training.

Efeito do uso profilático do anti-inflamatório não-esteroide ibuprofeno sobre o desempenho em uma sessão de treino de força / Effects of prophylactic anti-inflammatory non-steroidal ibuprofen on performance in a session of strength training

INTRODUÇÃO: Medicamentos anti-inflamatórios não esteroides, como o ibuprofeno, têm sido utilizados por atletas de várias modalidades com o intuito de aumentar desempenho esportivo. OBJETIVO: Verificar o efeito do uso profilático de ibuprofeno sobre desempenho em uma sessão de treino de força. MÉTODOS: Um ensaio clínico, cruzado, randomizado, duplo-cego e placebo-controlado foi desenvolvido com 12 praticantes regulares de treino de força do sexo masculino, os quais realizaram uma sessão de treino após a ingestão de ibuprofeno (1,2 g) e uma outra após a ingestão de placebo. Seis séries dos exercícios supino e agachamento foram realizadas em cada sessão de treino com uma carga constante correspondente a 65% da 1RM de cada exercício. O desempenho no treinamento foi mensurado através do número de repetições que os voluntários conseguiram realizar em cada série de exercício a cada sessão de treino de força. RESULTADOS: Não foram verificadas diferenças significativas de desempenho no treino de força com a administração prévia de placebo ou ibuprofeno (p > 0,05). CONCLUSÃO: A ingestão de ibuprofeno nos parâmetros de administração adotados pelo presente estudo não promove qualquer tipo de alteração na tolerância ao exercício em uma sessão isolada de treino de força, o que contraria a indicação dessa substância para fins ergogênicos no treino de força.

INTRODUCTION: Non-steroidal anti-inflammatory drugs, such as ibuprofen, have been used by athletes of several sports modalities in order to increase athletic performance. OBJECTIVE: To verify the effect of the prophylactic use of ibuprofen on performance in a strength training session. METHODS: A crossover, randomized, double-blind and placebo-controlled clinical assay was developed with twelve male regular practitioners of strength training who performed one strength training session after ibuprofen (1.2 g) ingestion and another session after placebo ingestion. Six series of bench press and squat exercises were performed in each training session with constant load corresponding to 65% of the 1RM in each exercise. The training performance was measured through the number of repetitions that volunteers have accomplished in each exercise series of each strength training session. RESULTS: No significant performance differences were verified in strength training with previous administration of placebo or ibuprofen (p < 0.05). CONCLUSION: Ibuprofen administration at the same parameters adopted by the present study does not promote any change on tolerance to exercise in a single strength training session, a fact which is contrary to the administration of this substance for ergogenic purposes in strength training.

Effects of strength training and detraining on knee extensor strength, muscle volume and muscle quality in elderly women.

Strength training seems to be an interesting approach to counteract decreases that affect knee extensor strength, muscle mass and muscle quality (force per unit of muscle mass) associated with ageing. However, there is no consensus regarding the changes in muscle mass and their contribution to strength during periods of training and detraining in the elderly. Therefore, this study aimed at verifying the behaviour of knee extensor muscle strength, muscle volume and muscle quality in elderly women in response to a 12-week strength training programme followed by a similar period of detraining. Statistical analysis showed no effect of time on muscle quality. However, strength and muscle volume increased from baseline to post-training (33 and 26 %, respectively). After detraining, the knee extensor strength remained 12 % superior to the baseline values, while the gains in muscle mass were almost completely lost. In conclusion, strength gains and losses due to strength training and detraining, respectively, could not be exclusively associated with muscle mass increases. Training-induced strength gains were partially maintained after 3 months of detraining in elderly subjects.

Efeitos de três programas de treinamento de força na qualidade de vida de idosas / Effects of three different strength training programs on quality life of enderly women

Estudos revelam a importância da força na realização de tarefas diárias, na diminuição de quedas e na capacidade funcional de idosas. O presente estudo tem como objetivo verificar os efeitos de três programas de treinamento de força na capacidade funcional, tempo de reação e força máxima e por conseguinte observar se estas modificações tiveram algum efeito nos padrões de qualidade de vida das idosas. A amostra foi composta por 45 indivíduos do sexo feminino com idades entre 60 e 75 anos, recrutadas voluntariamente e separadas em grupo controle (GC), treinamento de potência (TP), treinamento de força reativa (TR) e treinamento de força máxima (TF). A qualidade de vida foi avaliada pelo questionário validado, WHOQOL-BREF. A potência, força reativa e força máxima foram avaliadas respectivamente através do teste de sentar /levantar em 30 segundos, do tempo de reação e do teste de 1 RM (uma repetição máxima). Os resultados indicaram um aumento significativo dos valores médios das variáveis comparativamente ao GC (p<0,05). Além disso, houve uma melhora significativa das variáveis funcionais associadas a especificidade de cada treinamento. No entanto, não foram encontradas diferenças estatisticamente significativas entre os valores médios dos domínios da qualidade de vida e entre os três grupos de treinamento e o GC. Nesta perspectiva, os resultados sugerem uma melhora da capacidade funcional de idosas submetidas a três programas de treinamento comparativamente ao GC.

Studies have shown the importance of strength to carry out daily tasks, on the reduction of falls and on functional capacity of elderly women. The present study has as objective to verify the effects of three strength training programs on functional capacity, reaction time and maximum strength and therefore see if these changes have any effect on different standards of quality of life of elderly women. The sample consisted of 45 females aged between 60 and 75 years, voluntarily recruited and separated into control group (CG), power training (PT), reactive strength training (TR) and maximum strength training (TF). Quality of life was assessed using the validated questionnaire WHOQOL-BREF. The power, reactive power and maximum strength were respectively evaluated by testing for sit / stand in 30 seconds, reaction time and the 1 RM (one repetition maximum). The results indicates a significant increase in mean values of variables compared to the control group (p <0.05). In addition, there was a significant improvement of the variables associated with functional specificity of each training, however, found no statistically significant differences between mean values of the domains of quality of life and among the three training groups and the GC. In this perspective, the results suggest an improvement in functional capacity of elderly women undergoing three training programs compared to GC.

Análise da força isométrica máxima e do sinal de EMG em exercícios para os membros inferiores / Analysis of maximal isometric force and EMG signal in lower limb exercise

O objetivo deste estudo foi comparar a força isométrica máxima (FIM) e a atividade elétrica dos músculos vasto medial (VM), vasto lateral (VL), reto femoral (RF), glúteo máximo (GM) e bíceps femoral (BF) entre contrações isométricas voluntárias máximas (CIVM) executadas em diferentes posições articulares e identificar as mais adequadas para normalizar o sinal de eletromiografia (EMG) de cada um dos músculos referidos, quando estes são ativados em condições dinâmicas. A amostra foi constituída de 10 indivíduos do sexo masculino, com idades entre 20 e 30 anos, familiarizados com treinamento de força. Foram realizadas CIVMs em diferentes ângulos articulares para os grupos extensores e flexores do joelho (0°, 60°, 90°) e extensores (-30°, 0°, 60°) e flexores do quadril (90°, 120°). Sobre a FIM foram encontrados valores significativamente diferentes entre as posições em 60° para flexão de joelhos e para extensão de joelhos em 60° e 90° (p<0,01) e não houve diferenças significativas entre as posições na flexão e extensão do quadril (p>0,05). Em relação ao sinal EMG, foram encontrados valores significativamente diferentes entre os ângulos para a extensão de joelhos somente no RF em 90° (p<0,01). Para a flexão de joelhos, flexão e extensão de quadril não foram encontradas diferenças siginificativas entre os músculos nos diferentes ângulos avaliados (p>0,05). Estes resultados sugerem que a posição de 60° é a mais adequada para avaliação dos flexores e extensores do joelho e que todas posições testadas neste estudo apresentam-se como adequadas para a avaliação da flexão e extensão de quadril.

The aim of this study was to compare maximal isometric force (MIF) and the electrical activity of the vastus medialis, vastus lateralis, rectus femoris, gluteus maximus and biceps femoris long head muscles between maximal voluntary contractions (MVC) performed at different joint angles, and to identify the most suitable positions to normalize the electromyography (EMG) signals from each of these muscles when they are activated under dynamic conditions. Ten men ranging in age from 20 to 30 years, who were familiar with strength training exercise, were studied. MVC at different joint angles of the knee extensors and flexors (0°, 60°, 90°) and hip extensors (-30°, 0°, 60°) and flexors (90°, 120°) were tested. The MIF values differed significantly between the 60° knee flexion and 60° and 90° knee extension positions (p<0.01). The same was not observed for hip flexion or extension (p>0.05). Significantly higher EMG values were only observed for the rectus femoris muscle at 90° knee extension (p<0.01). No differences between muscles were found for knee flexion, hip flexion or hip extension at the joint angles tested (p>0.05). These results suggest that the 60° knee joint flexion position is the most suitable for assessment of knee extension and flexion MIF, and that all positions tested in this study are suitable for the assessment of hip flexion and extension.

Efeitos de diferentes tipos de treinamento de força no desempenho de capacidades funcionais em mulheres idosas / Effects of different types of strength training on the functional capacity performance in elderly women

Os diferentes tipos de treinamento de força (TF) apresentam distintasadaptações do tecido muscular como o desenvolvimento de forçamáxima, potência e/ou força reativa muscular. Dentre estes tipos deTF, estão os treinamentos de força tradicional (TFT), potência (TP) ede força reativa, em que está presente o ciclo-alongamento-encurtamento(CAE) (TR). A habilidade de produzir força rapidamenterequer a participação intensa das fibras do tipo IIX, condição esta frequentemente reduzida em mulheres idosas. A força rápida tem importânciasignificativa, para homens e mulheres de todas as idades,destacando-se ainda mais em mulheres idosas. A prescrição de umtipo de TF que melhor desenvolva as atividades de vida diária (AVD)é primordial para a manutenção da independência física e qualidadede vida de idosas. A metodologia embasou-se em pesqui sabibliográfica, utilizando artigos atuais e clássicos da literatura sobreTF em mulheres idosas (publicados a partir de 2000) selecionadosnas bases de dados Pubmed e Sportdiscus, que compa rasseme analisassem pelo menos dois tipos específicos de TF (TFT, TPe TR). Sendo assim, o objetivo do presente estudo de revisão foicomparar os efeitos de três diferentes tipos de TF no desempenhode capacidades funcionais em mulheres idosas. Como resultadosos artigos consultados apresentam um consenso de que o TP e TRdesenvolvam de forma mais eficaz as capacidades funcionais demulheres idosas e que o TR é mais efetivo no desenvolvimento daforça reativa muscular que o TP. Dessa forma, conclui-se que o TRé mais efetivo para o desenvolvimento da produção de força rápidado músculo que os outros tipos específicos de treinamento de forçae por consequência disto, melhor desenvolve as capacidades funcionaisde mulheres idosas.(AU)

Distinct adaptations of muscle tissue as the development of maximumstrength, power and/or reactive muscle strength seems to beassociated with different programs of strength training (ST). Amongthese several programs, there are the traditional strength training(TST), the power training (PT) and the reactive force, in which is presentthe stretch-shortening cycle (SSC) (RT). The ability to produceforce rapidly requires intense participation of the type IIX fibers. Thiscondition is often reduced in older women. However, this kind offorce adaptation is very important for the elderly women functionalcapacity. Consequently, the prescription of one type of ST that bestcarries out the activities of daily living (ADL) is essential for maintainingphysical independence and quality of life of elderly women.Therefore, the aim of this review study was to compare the effects ofthree different programs of ST in the performance of functional abilitiesin older women throughout a research on the current and classicpapers (published since 2000) selected from the Pubmed andSPORTDiscus databases, that compare and analyze at least twospecific types of ST (i.e. TST, PT and RT). The results of our reviewshowed that the PT and RT are more effective for the developmentof functional capacities for older women than the other programsstudied. Furthermore, the RT is more effective in developing reactivemuscular strength exercises with the use of SSC than PT. The conclusionof the present study was that RT is more effective than theothers specific programs studied of strength training for the developmentof rapid force. as well as, it was the best program associatedwith the development of the functional capacity for older women.(AU)

Efeitos de diferentes tipos de treinamento de força no desempenho de capacidades funcionais em mulheres idosas / Effects of different types of strength training on the functional capacity performance in elderly women

Os diferentes tipos de treinamento de força (TF) apresentam distintasadaptações do tecido muscular como o desenvolvimento de forçamáxima, potência e/ou força reativa muscular. Dentre estes tipos deTF, estão os treinamentos de força tradicional (TFT), potência (TP) ede força reativa, em que está presente o ciclo-alongamento-encurtamento(CAE) (TR). A habilidade de produzir força rapidamenterequer a participação intensa das fibras do tipo IIX, condição esta frequentemente reduzida em mulheres idosas. A força rápida tem importânciasignificativa, para homens e mulheres de todas as idades,destacando-se ainda mais em mulheres idosas. A prescrição de umtipo de TF que melhor desenvolva as atividades de vida diária (AVD)é primordial para a manutenção da independência física e qualidadede vida de idosas. A metodologia embasou-se em pesqui sabibliográfica, utilizando artigos atuais e clássicos da literatura sobreTF em mulheres idosas (publicados a partir de 2000) selecionadosnas bases de dados Pubmed e Sportdiscus, que compa rasseme analisassem pelo menos dois tipos específicos de TF (TFT, TPe TR). Sendo assim, o objetivo do presente estudo de revisão foicomparar os efeitos de três diferentes tipos de TF no desempenhode capacidades funcionais em mulheres idosas. Como resultadosos artigos consultados apresentam um consenso de que o TP e TRdesenvolvam de forma mais eficaz as capacidades funcionais demulheres idosas e que o TR é mais efetivo no desenvolvimento daforça reativa muscular que o TP. Dessa forma, conclui-se que o TRé mais efetivo para o desenvolvimento da produção de força rápidado músculo que os outros tipos específicos de treinamento de forçae por consequência disto, melhor desenvolve as capacidades funcionaisde mulheres idosas.

Distinct adaptations of muscle tissue as the development of maximumstrength, power and/or reactive muscle strength seems to beassociated with different programs of strength training (ST). Amongthese several programs, there are the traditional strength training(TST), the power training (PT) and the reactive force, in which is presentthe stretch-shortening cycle (SSC) (RT). The ability to produceforce rapidly requires intense participation of the type IIX fibers. Thiscondition is often reduced in older women. However, this kind offorce adaptation is very important for the elderly women functionalcapacity. Consequently, the prescription of one type of ST that bestcarries out the activities of daily living (ADL) is essential for maintainingphysical independence and quality of life of elderly women.Therefore, the aim of this review study was to compare the effects ofthree different programs of ST in the performance of functional abilitiesin older women throughout a research on the current and classicpapers (published since 2000) selected from the Pubmed andSPORTDiscus databases, that compare and analyze at least twospecific types of ST (i.e. TST, PT and RT). The results of our reviewshowed that the PT and RT are more effective for the developmentof functional capacities for older women than the other programsstudied. Furthermore, the RT is more effective in developing reactivemuscular strength exercises with the use of SSC than PT. The conclusionof the present study was that RT is more effective than theothers specific programs studied of strength training for the developmentof rapid force. as well as, it was the best program associatedwith the development of the functional capacity for older women.

Neuromuscular economy, strength, and endurance in healthy elderly men.

Declines in muscular strength resulting from reduced neural activity may influence the reduction in aerobic capacity in older men. However, there has been little investigation into the relationship between muscular strength and economy of movement during aerobic exercise in elderly subjects. Thus, the purpose of this study was to investigate the possible relationship between strength, aerobic performance, and neuromuscular economy in older men. Twenty-eight aged men (65 ± 4 years old) were evaluated in dynamic (1 repetition maximum test), isometric strength (maximal voluntary contraction), and rate of force development. Peak oxygen uptake, maximal workload, and ventilatory threshold were determined during a ramp protocol on a cycle ergometer. Throughout the same protocol, the neuromuscular economy (electromyographic signal) of the vastus lateralis was measured. Significant correlations were found between muscular strength, cardiorespiratory fitness, and neuromuscular economy (r = 0.43-0.64, p < 0.05). Our results suggest that cardiorespiratory capacity and economy of movement are associated with muscular strength during aging.