Dietary Intervention Associated With Moderate-Intensity Continuous Training Leads to Changes in the Inflammatory Profile in Visceral Adipose Tissue but Not in Skeletal Muscle in Diet-Induced Obese Rats.

This study aimed to determine the concentrations of inflammatory markers in visceral adipose tissue (VAT) and skeletal muscle, and changes in body mass and adipocyte size in diet-induced obese rats after moderate-intensity continuous training (MICT) and/or dietary intervention. After 8 weeks of obesity induction through a high-fat diet (HFD) consumption, twenty diet-induced obese male Wistar rats were divided into four groups as follows: (i) control rats fed with HFD (HFD-SED), (ii) obese rats fed with HFD and submitted to MICT (HFD-MICT), (iii) obese rats that were submitted to a nutritional intervention by switching HFD to chow diet (CD-SED), and (iv) obese rats that were submitted to MICT and nutritional intervention (CD-MICT). All the animals in the training groups were submitted to MICT, with an intensity of 50-85% of V max , 60 min/day, 3 days/week for 8 weeks. Gastrocnemius muscle (GAST) and mesenteric adipose tissue (mWAT) were collected to quantify tumor necrosis factor alpha (TNF-α), interleukin (IL)-6, and IL-10 using ELISA. The body mass was recorded before and after the experimental protocols, and the adipocyte morphology was assessed using histological analysis. The results showed that HFD-SED had higher body mass, higher concentrations of inflammatory markers in mWAT, and higher increase in adipocyte size. The CD-SED and CD-MICT groups presented with reduced body mass, relative weight of mWAT, and adipocyte size. Moreover, the inflammatory markers in mWAT were reduced after dietary intervention (TNF-α), MICT (IL-10 and TNF-α), or both interventions combined (IL-6 and TNF-α). In contrast, there was no reduction in GAST-relative weight or concentrations of inflammatory markers for any treatment. Finally, we concluded that 8 weeks of dietary intervention alone and combined with MICT were effective in reducing some of the deleterious effects caused by obesity.

Dietary Intervention, When Not Associated With Exercise, Upregulates Irisin/FNDC5 While Reducing Visceral Adiposity Markers in Obese Rats.

Obesity is an epidemic disease and the expansion of adipose tissue, especially visceral fat, promotes the secretion of factors that lead to comorbidities such as diabetes and cardiovascular diseases. Thus, diet and exercise have been proposed as an intervention to reverse these complications. An adipocytokine, known as irisin, mediates the beneficial effects of exercise. It has been proposed as a therapeutic potential in controlling obesity. In view of the above, this paper attempts to determine the modulation of irisin, visceral adiposity and biochemical markers in response to dietary intervention and aerobic exercise. To do this, 52 diet-induced obese male Wistar rats were divided into the following four groups: high-fat diet and exercise (HFD-Ex); HFD-Sedentary (HFD-Sed); chow-diet and exercise (CD-Exercise); and CD-Sed. The exercise-trained group performed a treadmill protocol for 60 min/day, 3 days/week for 8 weeks. Body mass (BM), body fat (BF), fat mass (FM), and fat-free mass (FFM) were analyzed. Mesenteric (MES), epididymal (EPI), and retroperitoneal (RET) adipose tissue was collected and histological analysis was performed. Biochemical irisin, triglycerides, glucose, insulin and inflammatory markers were determined and, FNDC5 protein expression was analyzed. In this study, the diet was the most important factor in reducing visceral adiposity in the short and long term. Exercise was an important factor in preserving muscle mass and reducing visceral depots after a long term. Moreover, the combination of diet and exercise can enhance these effects. Diet and exercise exclusively were the factors capable of increasing the values of irisin/FNDC5, however it did not bring cumulative effects of both interventions. Prescriptions to enhance the obesity treatments should involve reducing visceral adiposity by reducing the fat content in the diet associated with aerobic exercise.

High-Intensity Interval Training Does Not Change Vaspin and Omentin and Does Not Reduce Visceral Adipose Tissue in Obese Rats.

This study aimed to determine the expression of omentin and vaspin, inflammatory markers, body composition, and lipid profile in diet-induced obese rats and high-intensity interval training (HIIT). Forty Wistar rats were divided into four groups: untrained normal diet, trained normal diet (T-ND), untrained high-fat diet (Unt-HFD), and trained high-fat diet (T-HFD). For the animals of the Unt-HFD and T-HFD groups, a high-fat diet was offered for 4 weeks. After that, all the animals in the T-ND and T-HFD groups were submitted to HITT, three times per week, for 10 weeks (2 weeks of adaptation and 8 weeks of HIIT). Muscle (gastrocnemius), liver, epididymal adipose tissue, retroperitoneal adipose tissue, visceral adipose tissue (VAT), and serum were collected to analyze TNF-α, IL-6, PCR, IL-8, IL-10, IL-4, vaspin, and omentin. A body composition analysis was performed before adaptation to HIIT protocol and after the last exercise session using dual-energy X-ray absorptiometry. Omentin and vaspin in the VAT were quantified using Western blotting. The results showed that, when fed a high-fat diet, the animals obtained significant gains in body fat and elevated serum concentrations of vaspin and blood triglycerides. The HIIT was able to minimize body fat gain but did not reduce visceral fat despite the increase in maximum exercise capacity. Moreover, there was a reduction in the serum levels of adiponectin, IL-6, and IL-10. Finally, we concluded that, although the training protocol was able to slow down the weight gain of the animals, there was no reduction in visceral fat or an improvement in the inflammatory profile, including no changes in omentin and vaspin.

Benefits of resistance training on body composition and glucose clearance are inhibited by long-term low carbohydrate diet in rats.

BACKGROUND/OBJECTIVES: Regular exercise training is effective to altering many markers of metabolic syndrome and its effects are strongly influenced by the type of consumed diet. Nowadays, resistance training (RT) has been frequently associated with low-carbohydrate high-fat diet (LCD). After long term these diets causes body weight (BW) regain with deleterious effects on body composition and metabolic risk factors. The effects of RT associated with long-term LCD on these parameters remain unexplored. We aimed to investigate the effects of RT when associated with long-term LCD on BW, feed efficiency, body composition, glucose homeostasis, liver parameters and serum biochemical parameters during BW regain period in rats. SUBJECTS/METHODS: Male Sprague-Dawley rats were fed with LCD (LC groups) or standard diet (STD) (ST groups). After 10 weeks-diet animals were separated into sedentary (Sed-LC and Sed-ST) and resistance-trained (RT-LC and RT-ST) groups (N = 8/group). RT groups performed an 11-week climbing program on a ladder with progressive load. Dual x-ray absorptiometry, glucose tolerance tests and insulin tolerance tests were performed at weeks 10 and 20. Liver and serum were collected at week 21. RESULTS: RT reduced feed efficiency, BW gain, liver fat and total and LDL cholesterol, and improved body composition and glucose clearance in animals fed on STD. In those fed with LCD, RT reduced caloric intake, BW regain, liver fat and serum triglycerides levels. However, improvement in body composition was inhibited and bone mineral density and glucose clearance was further impaired in this association. CONCLUSIONS: The LCD nullifies the beneficial effects of RT on body composition, glucose homeostasis and impairs some health parameters. Our results do not support the association of RT with LCD in a long term period.

Endothelial Dysfunction and Inflammation Precedes Elevations in Blood Pressure Induced by a High-Fat Diet.

BACKGROUND: Obesity leads to a chronic inflammatory state, endothelial dysfunction and hypertension. OBJECTIVE: To establish the time-course of events regarding inflammatory markers, endothelial dysfunction, systolic blood pressure (SBP) in obesity in only one experimental model. METHODS: We fed male Wistar rats (eight-week age) with a standard diet (Control - CT, n = 35), or palatable high-fat diet (HFD, n = 35) for 24 weeks. Every six weeks, 7 animals from each group were randomly selected for euthanasia. SBP and serum levels of interleukin-6, tumor necrosis factor-α, C-reactive protein, adiponectin and nitric oxide were determined. Endothelial and vascular smooth muscle functions were determined in dissected aorta and lipid peroxidation was measured. Statistical significance was set at p < 0.05. RESULTS: Levels of pro-inflammatory cytokines began to increase after six weeks of a high-fat diet, while those of the anti-inflammatory cytokine adiponectin decreased. Interestingly, the endothelial function and serum nitric oxide began to decrease after six weeks in HFD group. The SBP and lipid peroxidation began to increase at 12 weeks in HFD group. In addition, we showed that total visceral fat mass was negatively correlated with endothelial function and positively correlated with SBP. CONCLUSION: Our results show the time-course of deleterious effects and their correlation with obesity.

Endothelial Dysfunction and Inflammation Precedes Elevations in Blood Pressure Induced by a High-Fat Diet / Disfunção Endotelial e Inflamação Precedem a Elevação da Pressão Arterial Induzida por Dieta Hiperlipídica

Abstract Background: Obesity leads to a chronic inflammatory state, endothelial dysfunction and hypertension. Objective: To establish the time-course of events regarding inflammatory markers, endothelial dysfunction, systolic blood pressure (SBP) in obesity in only one experimental model. Methods: We fed male Wistar rats (eight-week age) with a standard diet (Control - CT, n = 35), or palatable high-fat diet (HFD, n = 35) for 24 weeks. Every six weeks, 7 animals from each group were randomly selected for euthanasia. SBP and serum levels of interleukin-6, tumor necrosis factor-α, C-reactive protein, adiponectin and nitric oxide were determined. Endothelial and vascular smooth muscle functions were determined in dissected aorta and lipid peroxidation was measured. Statistical significance was set at p < 0.05. Results: Levels of pro-inflammatory cytokines began to increase after six weeks of a high-fat diet, while those of the anti-inflammatory cytokine adiponectin decreased. Interestingly, the endothelial function and serum nitric oxide began to decrease after six weeks in HFD group. The SBP and lipid peroxidation began to increase at 12 weeks in HFD group. In addition, we showed that total visceral fat mass was negatively correlated with endothelial function and positively correlated with SBP. Conclusion: Our results show the time-course of deleterious effects and their correlation with obesity.

Resumo Fundamento: A obesidade leva a um estado de inflamação crônica, disfunção endotelial e hipertensão. Objetivo: Estabelecer a sequência de eventos relacionados a marcadores inflamatórios, disfunção endotelial e pressão arterial sistólica (PAS) na obesidade em um modelo experimental. Métodos: Ratos Wistar machos (8 semanas de idade) receberam dieta padrão (Controle - CT, n = 35) ou uma dieta palatável hiperlipídica (DHL, n = 35) por 24 semanas. A cada seis semanas, 7 animais de cada grupo foram aleatoriamente selecionados para eutanásia. Foram determinados a PAS, e níveis séricos de interleucina-6, fator de necrose tumoral-a, proteína C reativa, adiponectina e óxido nítrico. As funções do músculo liso endotelial e vascular foram determinadas na aorta dissecada, e medida a peroxidação lipídica. A significância estatística foi estabelecida em p < 0,05. Resultados: os níveis das citocinas pró-inflamatórias começaram a aumentar após seis semanas de dieta hiperlipídica, enquanto os níveis da citocina anti-inflamatória adiponectina diminuíram. Um resultado interessante foi a redução da função endotelial e do óxido nítrico após seis semanas no grupo DHL. Além disso, mostramos que a massa de tecido adiposo visceral total esteve negativamente correlacionada com função endotelial e positivamente correlacionada com a PAS. Conclusão: Nossos resultados demonstram a progressão temporal dos efeitos deletérios e sua correlação com a obesidade.

Exercise and Omentin: Their Role in the Crosstalk Between Muscle and Adipose Tissues in Type 2 Diabetes Mellitus Rat Models.

This study aims to analyze the effects of resisted, aerobic, and combined exercises on omentin levels in visceral adipose tissue and muscle of rats with experimental diabetes to verify whether these adipokines are related to the glucose pathway and inflammation process in this model. Male Wistar rats received a high-fat diet for 4 weeks and a low dose of streptozotocin (35 mg/kg) to induce experimental diabetes. After inducing diabetes, the animals were divided into 4 experimental groups (n = 10): diabetic control (C); resistance training (RT); aerobic training (AT); and combined training (CT). The groups were exercised for 12 weeks, 3 times/week, where: RT means the stair climbing protocol until exhaustion; AT is the 30 min/day reaching 20 m/min protocol, and CT is the combination of RT and AT. The AT group showed reduced retroperitoneal and mesenteric adipose tissue and abdominal fat deposits. Our study also showed a possible control of blood glucose, as well as decreased Interleukin 6 (IL-6) and C-reactive protein, increased circulating adiponectin and increased omentin in visceral adipose tissue. In addition, the AT group affected the glucose pathway by stimulating phosphorylation of Akt in muscle tissue. Omentin also showed a strong positive correlation with adiponectin and a moderate negative correlation with IL-6. Thus, our findings indicated that omentin in type 2 diabetes is changed by AT. Furthermore, increased omentin levels had a close association with the glucose pathway by stimulating phosphorylation of Akt in muscle tissue and with IL-6 in serum, suggesting that omentin is likely to have anti-inflammatory and protective action in experimental diabetes.

Experimental type 2 diabetes induction reduces serum vaspin, but not serum omentin, in Wistar rats.

Vaspin and omentin are adipose tissue adipokines that have often been related to obesity and its comorbidities. The aim of this study was to investigate the behaviour of serum omentin and vaspin in models of type 2 diabetes. To do this, Wistar rats (~200 g) were randomly divided into two groups: a non-diabetic group (n = 6) and a diabetic group fed on a high-fat diet (n = 6) and a low dose of streptozotocin (Sigma® ). All procedures were approved by the Brazilian Ethics Committee. Body weight (BW) and food intake were recorded daily. Tail blood glucose levels were assessed at the end of the diabetes induction period. The insulin tolerance test (ITT) was performed after the diabetes induction period (7 weeks). The serum and tissues (liver, pancreas, and retroperitoneal (RET), epididymal (EPI) and visceral (VIS) white adipose tissues) were immediately removed and weighed. Analyses of levels of insulin, omentin, vaspin, adiponectin and inflammatory cytokines IL-6, IL-8 (CXCL8), TNF-α and C-reactive protein (CRP) in serum were performed using the enzyme-linked immunosorbent assay (ELISA). Our results showed that IL-8 and CRP serum levels in the diabetic group were significantly higher than in the non-diabetic group. Vaspin and adiponectin values were lower for the diabetic group than for the non-diabetic group. Omentin, IL-6 and TNF-α values did not differ between the groups. Our results showed that both the metabolism of the adipose tissue and the secretion of adipokines may be affected in diabetic rats. Omentin showed no difference between the groups, although the vaspin values decreased in the diabetic group.

Acute effects of Resistance exercise performed on ladder on energy metabolism, stress, and muscle damage in rats

Abstract AIMS To evaluate the acute effects of a resistance exercise session performed on ladder on energy metabolism, stress, and muscle damage in rats. METHODS Male Wistar rats were randomly distributed in Exercise (E) (n=30) and Control (C) (n = 20) groups. The E group performed a resistance exercise session on a vertical ladder with weights on their tails. Blood samples were collected at rest and after each climb to analyze lactate levels and ten minutes after the last climb to analyze lactate dehydrogenase (LDH), creatine kinase (CK), and corticosterone levels. RESULTS Blood lactate levels remained stable during exercise. Serum corticosterone, blood glucose, LDH and CK levels increased and glycogen content decreased in the E group, when compared to the C group. CONCLUSION These results suggest that resistance exercise performed on ladder is a model of high-intensity exercise. However, the stabilization of lactate during the session suggests that the aerobic metabolism is an important factor during the intervals between climbs.(AU)

The effects of exercise modalities on adiposity in obese rats

OBJECTIVE: The aim of the present study was to evaluate the effect of both swimming and resistance training on tumor necrosis factor-alpha and interleukin-10 expression, adipocyte area and lipid profiles in rats fed a high-fat diet. METHODS: The study was conducted over an eight-week period on Wistar adult rats, who were divided into six groups as follows (n = 10 per group): sedentary chow diet, sedentary high-fat diet, swimming plus chow diet, swimming plus high-fat diet, resistance training plus chow diet, and resistance training plus high-fat diet. Rats in the resistance training groups climbed a vertical ladder with weights on their tails once every three days. The swimming groups swam for 60 minutes/day, five days/week. RESULTS: The high-fat diet groups had higher body weights, a greater amount of adipose tissue, and higher tumor necrosis factor-alpha expression in the visceral adipose tissue. Furthermore, the high-fat diet promoted a negative change in the lipid profile. In the resistance training high-fat group, the tumor necrosis factor-alpha expression was lower than that in the swimming high-fat and sedentary high-fat groups. Moreover, smaller visceral and retroperitoneal adipocyte areas were found in the resistance training high-fat group than in the sedentary high-fat group. In the swimming high-fat group, the tumor necrosis factor-alpha expression was lower and the epididymal and retroperitoneal adipocyte areas were smaller compared with the sedentary high-fat group. CONCLUSION: The results showed that both exercise modalities improved the lipid profile, adiposity and obesity-associated inflammation in rats, suggesting their use as an alternative to control the deleterious effects of a high-fat diet in humans.

The effects of exercise modalities on adiposity in obese rats.

OBJECTIVE: The aim of the present study was to evaluate the effect of both swimming and resistance training on tumor necrosis factor-alpha and interleukin-10 expression, adipocyte area and lipid profiles in rats fed a high-fat diet. METHODS: The study was conducted over an eight-week period on Wistar adult rats, who were divided into six groups as follows (n = 10 per group): sedentary chow diet, sedentary high-fat diet, swimming plus chow diet, swimming plus high-fat diet, resistance training plus chow diet, and resistance training plus high-fat diet. Rats in the resistance training groups climbed a vertical ladder with weights on their tails once every three days. The swimming groups swam for 60 minutes/day, five days/week. RESULTS: The high-fat diet groups had higher body weights, a greater amount of adipose tissue, and higher tumor necrosis factor-alpha expression in the visceral adipose tissue. Furthermore, the high-fat diet promoted a negative change in the lipid profile. In the resistance training high-fat group, the tumor necrosis factor-alpha expression was lower than that in the swimming high-fat and sedentary high-fat groups. Moreover, smaller visceral and retroperitoneal adipocyte areas were found in the resistance training high-fat group than in the sedentary high-fat group. In the swimming high-fat group, the tumor necrosis factor-alpha expression was lower and the epididymal and retroperitoneal adipocyte areas were smaller compared with the sedentary high-fat group. CONCLUSION: The results showed that both exercise modalities improved the lipid profile, adiposity and obesity-associated inflammation in rats, suggesting their use as an alternative to control the deleterious effects of a high-fat diet in humans.

Comparação do equilíbrio corporal de mulheres a partir da meia-idade obesas e não-obesas / Body balance comparison betweeen obese and non-obese women from middle-age on

Este é um estudo comparativo do efeito da obesidade no equilíbrio estático e dinâmico de mulheres a partir da meia-idade. A amostra foi composta por mulheres acima de 50 anos (n=80), distribuídas segundo o índice de massa corporal em grupo não-obeso (n=45) e obeso (n=35), com médias de idade equivalentes. Foram avaliadas quanto à gordura corporal por bioimpedância e quanto ao equilíbrio pelos testes de apoio unipodal (TAU) e de velocidade máxima de andar (VMA). Os dados foram tratados estatisticamente. No TAU em ambos os membros inferiores o grupo não-obeso permaneceu por mais tempo na posição – 25,6 segundos (s) no membro direito e 24,9 s no esquerdo – do que o grupo obeso (19,0 s no direito e17,5 s no esquerdo, p<0,01). No VMA o grupo obeso apresentou marcha mais lenta e velocidade média menor quando comparado ao grupo não obeso (p<0,027). No grupo não-obeso, verificaram-se correlações moderadas entre a gordura corporal e o equilíbrio estático e dinâmico; no grupo obeso não foram encontradas correlações entre a gordura corporal e a maioria das variáveis de equilíbrio. Os resultados evidenciam que a obesidade contribui para o pior desempenho no equilíbrio de mulheres de meia-idade e idosas...

This is a comparative study on the effect of obesity on static and dynamic balance in middle-aged and elderly women. The sample was composed by 80 women over 50 years old, distributed according to the body mass index into a non-obese group (n=45) and an obese group (n=35), with similar mean age. Participants were assessed as to body fat by bioimpedance and submitted to the one leg stance (OLS) and maximum walking speed (MWS) tests. Data were statistically analysed. At the OLS on both feet the non-obese group remained longer in position – 25.6 seconds (s) on the right limb and 24,9 s on the left one – than the obese group (19.0 s on the right, 17.5 s on the left limb, p<0.01). At he MWS test the obese group showed slower walking and lower mean speed than the non-obese group (p<0,027).Within non-obese group results, moderate correlations were found between body fat and static and dynamic balance; in the obese group practically no corresponding correlations were found. Results show that obesity contributes to worse balance performance in middle-age and elderly women...

Efeitos de dois tipos de treinamento de natação sobre a adiposidade e o perfil lipídico de ratos obesos exógenos / Effects of two different types of swimming exercise on adiposity and lipid profile in rats with exogenous obesity

OBJETIVO: Investigar os efeitos do exercício de natação intermitente em relação ao exercício contínuo e ao sedentarismo, em ratos Wistar, após o desenvolvimento de obesidade exógena pela administração de uma dieta hiperlipídica palatável sobre: evolução do peso corporal, ingestão alimentar, adiposidade, percentual de gordura dos tecidos e perfil lipídico. MÉTODOS: Foram utilizados ratos adultos, mantidos em gaiolas individuais, com livre acesso a água e comida. O protocolo experimental incluiu: 1) desenvolvimento da obesidade exógena (3 semanas), os animais foram divididos em: P: sedentários alimentados com dieta padrão Primor® (n=8) e H: sedentários alimentados com dieta hiperlipídica (n=32); 2) tratamentos (8 semanas subseqüentes), os animais (n=24) passaram a receber dieta padrão e foram divididos em: sedentário; treinado contínuo e treinado intermitente. Treinamentos (5x semana): Contínuo (90 minutos/dia) e Intermitente (3x30min/dia). Os animais foram submetidos à eutanásia (3 e 8 semanas), sendo coletados os tecidos adiposos, o fígado e o sangue. Foram determinados a adiposidade e o percentual de gordura dos tecidos adiposos e do fígado, o ganho de peso corporal, o consumo alimentar e o perfil lipídico. RESULTADOS: A dieta hiperlipídica aumentou a adiposidade, o percentual de gordura acumulada no fígado e desenvolveu dislipidemias. A troca de dieta e os dois tipos de treinamento foram capazes de reverter o quadro de obesidade exógena. Contudo, o exercício intermitente foi mais eficiente na redução da adiposidade e de ganho de peso. CONCLUSÃO: Associados à dieta balanceada, os treinamentos aplicados neste estudo poderiam ser utilizados como estratégia no controle de peso e de dislipidemias, tanto em modelos experimentais quanto em seres humanos.

OBJECTIVE: The objective was to look into the effects of intermittent swimming against continuous exercise and inactivity in Wistar rats after they developed exogenous obesity though the consumption of a palatable fat-rich diet. The following was investigated: evolution of body weight, food intake, adiposity, fat percentage in tissues and lipid profile. METHODS: Adult rats were kept in individual cages with free access to food and water. The experimental protocol included: 1) development of exogenous obesity (3 weeks). The animals were divided into S - inactive animals fed the standard Primor® diet (n=8) and HF - inactive animals fed a high-fat diet (n=32); 2) Treatment (the 8 following weeks) - the animals (n=24) were given the standard diet and divided into an inactive group, a continuous training group and an intermittent training group. Training occurred 5 times per week and was either continuous (90 minutes per day) or intermittent (3 times 30 minutes per day). The animals were killed at 3 and 8 weeks and the fat tissues, the liver and the blood were collected. Adiposity, fat percentage of the fat tissues and liver, gain of body weight, food consumption and lipid profile were determined. RESULTS: The high-fat diet increased adiposity, percentage of fat in the liver, and induced dyslipidemias. Diet change and the two types of training were capable of reducing exogenous obesity. However, intermittent exercise was more efficient in reducing adiposity and preventing weight gain. CONCLUSION: When associated with a balanced diet, the trainings used in this study can be used as a strategy to control weight and dyslipidemias, both in experimental models and in human beings.

A Educação Física e a estratégia de saúde da família: formação e atuação profissional / Physical education and the family health strategy: professional development and practice

O novo pensar e agir em saúde origina novos modelos de atenção em saúde, o que implica readequação do modo de intervir dos profissionais da área. As novas tendências exigem um olhar que extrapole os aspectos biológicos e tenha o sujeito - indivíduo ou seu coletivo - como foco das ações, e o reconhecimento do limite da ação uniprofissional no ato de cuidar. Desse modo, as instituições formadoras reconhecem a necessidade de readequar seu projeto político-pedagógico e, consequentemente, seus currículos. O profissional de Educação Física, recém-incorporado pelos serviços públicos de saúde, deve ter sua formação repensada, uma vez que suas atribuições são diferentes de sua formação tradicional. Assim, o propósito deste trabalho foi pesquisar currículos de Graduação em Educação Física visando a analisar: i) o objeto dos cursos; ii) quais as disciplinas relacionadas à saúde; iii) a existência das disciplinas de Saúde Coletiva e Saúde Pública; e iv) a existência de disciplinas de estágio em saúde. Os resultados indicam que i) não há direcionamento dos cursos para o campo da saúde e os bachareis têm mais respaldo em saúde do que os licenciados; ii) predominam as disciplinas de abordagem curativa, prescritiva; iii) nenhuma das instituições possui o conjunto de disciplinas Saúde Coletiva, Saúde Pública e algumas não nem as contemplam; iv) o estágio no serviço público de saúde, na Atenção Básica, não é previsto em nenhuma instituição.

The new thinking and act on health gives rise to new models of health care, which requires readjustment of mode of action of professionals. New trends require a look that go beyond the biological aspects and have the subject - individual or their collective - and focus of action, and recognition of the limits of uni-professional action in care. Thus, the training institutions recognize the need to readjust their political and pedagogical project and, consequently, their curricula. The physical education professional, newly built by public health, should have rethought his training, since his duties are different from his traditional training. Thus, the purpose of this study was to investigate the undergraduate curriculum in Physical Education in order to examine: i) the object of the courses, ii) what are the disciplines related to health; iii) the existence of the disciplines of Public Health and Public Health, and iv) the existence of courses of training in health. The results indicate that: i) there is no targeting of the courses for the field of health and graduates have more support in health than the licensees; ii) disciplines with curative approach, prescriptive ones prevail; iii) none of the institutions have a set of disciplines og Public Health, Public Health and some do not even address them; iv) the stage in public health, primary care is not provided in any institution.

Dieta hiperlipídica e capacidade secretória de insulina em ratos / High-fat diet and secretory capacity of insulin in rats

OBJETIVOS: Este estudo investigou, em ratos, os efeitos da administração crônica de uma dieta hiperlipídica palatável sobre: ganho de peso, adiposidade, conteúdos de glicogênio hepático e muscular, glicemia e insulinemia, morfologia do pâncreas e secreção de insulina por ilhotas isoladas, incubadas in vitro. MÉTODOS: Ratos Wistar machos (21 dias de idade) foram alimentados com dieta hiperlipídica palatável ou com dieta padrão, durante 15 semanas. Peso corporal e consumo de ração foram avaliados diariamente, glicose e insulina plasmática foram avaliadas semanalmente. Após o sacrifício, pâncreas, fígado, gastrocnêmio e tecidos adiposos foram coletados e pesados. Cortes do pâncreas foram analisados por microscopia ótica comum. Insulina plasmática e a secretada por ilhotas isoladas, após incubação na presença de diferentes concentrações de glicose, foram avaliadas por radioimunoensaio. RESULTADOS: A dieta hiperlipídica palatável aumentou a adiposidade, a percentagem do ganho de peso corporal e o conteúdo do glicogênio hepático, quando comparada à dos animais alimentados com dieta padrão. Glicemias e insulinemias de jejum não diferiram entre os grupos. A secreção de insulina das ilhotas isoladas dos ratos aumentou, nos tratados com dieta hiperlipídica, apenas em presença de concentrações fisiológicas de glicose (G= 8,3mM). A dieta hiperlipídica reduziu o tamanho do pâncreas, mas aumentou o número de células beta. Além disso, o lúmen dos vasos sangüíneos pancreáticos apresentou-se reduzido, quando comparado aos controles. CONCLUSÃO: A obesidade provocada pela dieta hiperlipídica não alterou os níveis de glicose e insulina de jejum desses animais. Apesar das alterações morfológicas do pâncreas, a manutenção da normoglicemia dos ratos tratados com dieta hiperlipídica, provavelmente, deveu-se à capacidade preservada de suas ilhotas em secretar insulina.

Efeito de diferentes freqüências de exercício físico na prevenção da dislipidemia e da obesidade em ratos normo e hipercolesterolêmicos / Effect of physical training frequency on obesity and dyslipidemia prevention in normo and hypercholesterolemic rats

Inúmeros relatos científicos têm demonstrado os benefícios dos exercícios físicos realizados regularmente(três a cinco dias/semana), no entanto, os efeitos do treinamento realizado dois dias/semana tem sido negligenciado. Desta forma, o presente estudo objetivou comparar os ajustes fisiológicos crônicos decorrentes do treinamento físico realizado dois e cinco vezes/semana consecutivamente sobre o metabolismo e o perfil lipídico de ratos normo e hipercolesterolêmicos. Foram utilizados 48 ratos adultos da linhagem Wistar, sendo divididos em seis grupos, a saber; Dieta padrão: Grupo Sedentário(SP), Grupo Treinado cinco vezes/semana (TP5) e Grupo Treinado dois vezes/semana (TP2); Dieta hipercolesterolêmica: Grupo Sedentário (SH), Grupo Treinado cinco vezes/semana (TH5) e Grupo Treinadoduas vezes/semana (TH2). Após oito semanas de tratamento os ratos foram sacrificados, o plasma e os tecidos adiposos brancos retroperitoneal (RET) e epididimal (EPI) foram pesados e estocados para posteriores análises bioquímicas e morfométricas. Nos animais alimentados com dieta hipercolesterolêmica, o treinamento físico realizado de duas e cinco vezes/semana promoveu a reduçãodo peso corporal, do peso e do diâmetro dos adipócitos do EPI e RET, da taxa de lipogênese do EPI e dos níveis séricos de colesterol e triglicerídeos, sendo este efeito mais evidente com o treinamento de cinco vezes por semana, enquanto nos animais com dieta padrão apenas o treinamento realizado cinco vezes/semana promoveu alterações significativas em poucas variáveis analisadas, como na diminuição do ganho de peso e no diâmetro dos adipócitos do EPI e RET.