Moderate Aerobic Training Research Articles

Abstract 220: Exercise Training Attenuates Hypertension and Insulin Resistance in Old Fructose-fed Ovariectomized Rats

Menopause and aging are associated with a gradual increase in systolic blood pressure. Poor eating habits through food containing fructose, have also been related to alterations in the cardiovascular system; however, there are few studies available in the literature relating exercise training (ET), menopause, aging and metabolic syndrome. The aim of the present study was to investigate the effects of ET in ovarian hormone deprivation and/or fructose consumption in old Wistar rats. Female Wistar rats (24 months old) were ovariectomized, fed with fructose (100g/L in drinking water) or normal water, and submitted to an ET protocol in treadmill (1 h/day; 5 days/wk for 8 wk, ~ 40-60% of maximum test) or kept sedentary. The groups were: ovariectomized (O, n= 8), ovariectomized trained (OT, n= 8), ovariectomized fructose (OF, n= 8) and ovariectomized fructose trained (OFT, n= 8). Glycemia, triglycerides, adipose tissue, insulin resistance, physical capacity and blood pressure (BP) were evaluated at the end of the protocol. While the glycemia values remained within the normal range (O:90.1±7.; OT:85.2±2; OF:86±2; OFT:80.6±3 mg/dl) and the triglycerides values were increased in OF group (OF:182±20 vs. O:140.3±9; OT:143.5±7;; OFT:140 ±12 mg/dl). The physical capacity was increased in both OFT (1.8±0.1 Km/h) and OF (1.6±0.07 Km/h) when compared with sedentary peers (O:1.1±0.05; OF: 1.1±0.05 Km/h). The metabolic results showed that ET decreased the adipose tissue in (OT: 6.7±0.9 and OFT: 5.28±0.6 vs. OF: 10.07±0.6 g), and insulin resistance (OT:4.8±0.2 and OFT: 5.0±0.2 vs. OF: 3.2±0.6 mg/dl/%). No differences were observed in O group (O: 6.5±0.8g and 4.5±0.2 mg/dl/min). Finally, ET attenuated the increase in mean BP in both OT and OFT rats (O:119±2; OT 110±2; OF:119±2; OFT: 107±1 mmHg). The same behavior was observed in systolic BP (O:142±2; OT 127±2; OF:143±2; OFT: 129±1 mmHg) and diastolic BP (O:100±2; OT 92±2; OF:98±2; OFT: 89±1 mmHg). In conclusion, low to moderate aerobic ET can attenuate the deleterious effects of ovarian hormone deprivation, and/or fructose consumption, especially the blood pressure increase in old female Wistar rats.

Treino moderado de corrida causa alterações nas propriedades biomecânicas do tendão do calcâneo?

The effect of aerobic training has presented conflicting results regarding the bio- mechanical responses submitted by the tendon after a period of moderate aerobic training such as running. This study aims to evaluate the effect of a protocol running on a treadmill at moderate intensity on the mechanical properties of the Achilles tendons of rats. For mechanical test the tendons were pulled to the point of failure of the specimen. The moderate-intensity aerobic training in rats does not changes in the biomechanical properties of the Achilles tendon, thus, does not seem to pose a risk can be effective for not taking the Achilles tendon to mechanical stress and fatigue.

Moderate aerobic exercise alters migration patterns of antigen specific T helper cells within an asthmatic lung

Studies have indicated increased incidence and severity of allergic asthma due to western lifestyle and increased sedentary activity. Investigations also indicate that exercise reduces the severity of asthma; however, a mechanism of action has not been elucidated. Additional work implicates re-distribution of T helper (Th) cells in mediating alterations of the immune system as a result of moderate aerobic exercise in vivo. We have previously reported that exercise decreases T helper 2 (Th2) responses within the lungs of an ovalbumin (OVA)-sensitized murine allergic asthma model. Therefore, we hypothesized that exercise alters the migration of OVA-specific Th cells in an OVA-challenged lung. To test this hypothesis, wildtype mice received OVA-specific Th cells expressing a luciferase-reporter construct and were OVA-sensitized and exercised. OVA-specific Th cell migration was decreased in OVA-challenged lungs of exercised mice when compared to their sedentary controls. Surface expression levels of lung-homing chemokine receptors, CCR4 and CCR8, on Th cells and their cognate lung-homing chemokine gradients revealed no difference between exercised and sedentary OVA-sensitized mice. However, transwell migration experiments demonstrated that lung-derived Th cells from exercised OVA-sensitized mice exhibited decreased migratory function versus controls. These data suggest that Th cells from exercised mice are less responsive to lung-homing chemokine. Together, these studies demonstrate that moderate aerobic exercise training can reduce the accumulation of antigen-specific Th cell migration into an asthmatic lung by decreasing chemokine receptor function.

Effects of aerobic conditioning on cardiovascular sympathetic response to and recovery from challenge

Exercise has widely documented cardioprotective effects, but the mechanisms behind these effects are still poorly understood. Here, we test the hypothesis that aerobic training lowers cardiovascular sympathetic responses to and speeds recovery from challenge. We conducted a randomized, controlled trial contrasting aerobic versus strength training on indices of cardiac (pre-ejection period, PEP) and vascular (low-frequency blood pressure variability, LF-BPV) sympathetic responses to and recovery from psychological and orthostatic challenge in 149 young, healthy, sedentary adults. Aerobic and strength training did not alter PEP or LF-BPV reactivity to or recovery from challenge. These findings, from a large randomized, controlled trial using an intent-to-treat design, show that moderate aerobic exercise training has no effect on PEP and LF-BPV reactivity to or recovery from psychological or orthostatic challenge. In healthy young adults, the cardioprotective effects of exercise training are unlikely to be mediated by changes in sympathetic activity.

<b>Testis morphophysiology of rats treated with nandrolone decanoate and submitted to physical training</b> - doi: 10.4025/actascihealthsci.v35i2.16406

The mammalian testis is a complex organ with endocrine and exocrine functions. It consists of seminiferous tubules where the production of the male gametes called spermatogenesis occurs. This process is influenced by a number of factors including the use of physical performance-enhancing drugs. The objective of this study was to evaluate the effects of the anabolic steroid nandrolone decanoate on the morphofunctional structure of testes in sedentary rats and rats subjected to moderate aerobic exercise training. Twenty-four male rats were divided into four experimental groups: sedentary control, sedentary treated, trained control and trained treated.The training lasted eight weeks and consisted of running on a programmable ergometer treadmill, tailored to train eight rats simultaneously. Treated animals received intramuscular injections of nandrolone decanoate (0.5 mg kg -1 body weight) during the last four weeks of physical training, while the control groups received intramuscular injections of vehicle (vegetable oil).The male reproductive system morphology showed that treatment with nandrolone decanoate, in both sedentary and trained rats, promoted morphological and functional changes that result in reduced efficiency of spermatogenesis.

Aerobic Exercise and Strength Training Effects on Cardiovascular Sympathetic Function in Healthy Adults

Exercise has widely documented cardioprotective effects, but the mechanisms underlying these effects are not entirely known. Previously, we demonstrated that aerobic but not strength training lowered resting heart rate and increased cardiac vagal regulation, changes that were reversed by sedentary deconditioning. Here, we focus on the sympathetic nervous system and test whether aerobic training lowers levels of cardiovascular sympathetic activity in rest and that deconditioning would reverse this effect. We conducted a randomized controlled trial contrasting the effects of aerobic (A) versus strength (S) training on indices of cardiac (preejection period, or PEP) and vascular (low-frequency blood pressure variability, or LF BPV) sympathetic regulation in 149 young, healthy, and sedentary adults. Participants were studied before and after conditioning, as well as after 4 weeks of sedentary deconditioning. As previously reported, aerobic capacity increased in response to conditioning and decreased after deconditioning in the aerobic, but not the strength, training group. Contrary to prediction, there was no differential effect of training on either PEP (A: mean [SD] -0.83 [7.8] milliseconds versus S: 1.47 [6.69] milliseconds) or LF BPV (A: mean [SD] -0.09 [0.93] ln mm Hg(2) versus S: 0.06 [0.79] ln mm Hg(2)) (both p values > .05). These findings, from a large randomized controlled trial using an intent-to-treat design, show that moderate aerobic exercise training has no effect on resting state cardiovascular indices of PEP and LF BPV. These results indicate that in healthy, young adults, the cardioprotective effects of exercise training are unlikely to be mediated by changes in resting sympathetic activity. Clinicaltrials.gov identifier: NCT00358137.

Moderate intensity exercise does not modulate myostatin and follistatin gene expression in the gastrocnemius muscle of spontaneously hypertensive rats with heart failure

The myostatin/follistatin pathway modulates skeletal muscle trophism. Physical exercise has an important role in the heart failure treatment. In this study we evaluated the effects of moderate aerobic physical training on myostatin and follistatin gene expression and trophism in the gastrocnemius of spontaneously hypertensive rats with heart failure. Sixteen‐month‐old SHRs and normotensive Wistar‐Kyoto (WKY) rats were assigned to sedentary or trained groups. Exercise was performed on treadmill, 30 min/day, 5 days/week, 12 m/min for 4 months. Transthoracic echocardiogram was performed at the end of experiment. Gene expression was evaluated by real time RT‐PCR. Fiber cross‐sectional area was measured in HE‐stained histological sections.Statistical analysistwo‐way ANOVA and Tukey.ResultsEchocardiography showed left cardiac chambers dilation and left ventricular systolic and diastolic dysfunction in both SHR groups compared to the WKY groups. Gene expression of myostatin and follistatin did not differ between groups. Cross‐sectional area was reduced in both SHR groups compared to WKY and was not changed by exercise.ConclusionPhysical exercise does not modulate skeletal muscle trophism and myostatin and follistatin gene expression in spontaneously hypertensive rats with heart failure.

Different Types of Physical Activity on Inflammatory Biomarkers in Women With or Without Metabolic Disorders: A Systematic Review

Overwhelming data support the relationship between physical inactivity and inflammatory processes underlying metabolic disorders. The aim of this review was to assess critically the body of evidence for the relationships between exercise protocols and levels of inflammatory biomarkers in women. Systematic literature searches using PubMed Medline, Cochrane Central Register of Controlled Trials, Web of Science, LILACS, and SciELO of publications from 1993 to January 2012 were conducted using the following keywords: inflammation, cytokine, exercise, physical training, aerobic training, cardiovascular training, strength training, resistance training, interval training, cardiac rehabilitation, and therapeutic lifestyle modification/management. Three studies reported no significant changes in inflammatory status, one documented an increase in inflammatory biomarkers, and 12 articles reported decreased inflammatory biomarkers associated with exercise. Secondary lifestyle characteristics, such as strenuous physical labor or smoking, were correlated with levels of inflammatory biomarkers. Integrative interventions, including diet, moderate aerobic (60% to 80% of maximum heart rate, or 50% to 60% of VO2max) and circuit resistance training (8 to 10 exercises, 8 to 12 repetitions), health education, and counseling, used together, appeared to be effective strategies to improve inflammatory biomarkers in women.

Altered affective response to exercise is changed after moderate aerobic exercise training in migraine

Exercise is known to elicit affective response[1]. However, it is not known how this response behaves in migraine patients. This study is a case report of a young woman with migraine (M) according to ICHD-II. We aimed to verify the effect of 4 weeks of moderate aerobic exercise training (AET) on affective response and M clinical outcomes.

The Effects of Phase III Cardiac Rehabilitation in Serum and Salivary Hs-CRP and Anthropometric Measurements in Patients with Coronary Artery Disease

Cardiac rehabilitation is a key part in the treatment of coronary artery disease (CAD) by its anti-infammatory effects. However, the effect of exercise training programs on salivary concentrations of high-sensitivity C-reactive protein (hs-CRP) in patients with coronary artery disease has not been well studied. The objective of this study was to evaluate the effect of phase III cardiac rehabilitation on serum and salivary levels of hs-CRP, in relation to the anthropometric measurements of obesity and the relationship between salivary and serum levels of hs-CRP in CAD male patients. Forty male volunteers (45-75 years) with CAD participated in 6 to 8 weeks of moderate intensity aerobic exercise training consisting of 45 minutes sessions of treadmill, stationary bicycle and arm ergometer. Anthropometric measurements of obesity, serum level of hs-CRP, stimulated and nonstimulated salivary level of hs-CRP were measured at the beginning, in the middle and at the end of exercise sessions. All anthropometric measurements increased (p < 0.05) following cardiac rehabilitation except waist-hip ratio. Serum hs-CRP level reduced by 36% independent to the anthropometric measurements changes. Stimulated and nonstimulated salivary hs-CRP level decreased 68 and 54%, respectively, after 24 sessions of cardiac rehabilitation. Nonstimulated salivary hs-CRP levels correlated to serum levels of hs-CRP at baseline and after 24 sessions (p < 0.05). Phase III cardiac rehabilitation seems to be effective to improve serum and salivary hs-CRP concentrations independent of anthropometric measurements. Nonstimulated salivary hs-CRP measurement could be a surrogate for blood measurement of hs-CRP during cardiac rehabilitation in male patients with CAD.

Effect of short-term aerobic exercise on cardiovascular remodelling in post-menopause women

It is well known that menopause is associated with an increase of cardiovascular (CV) risk factors, including changes on metabolic profile, body composition, haemdynamic loads and cardiovascular remodelling. The latter starts with an increase of arterial elastance and early concentric left ventricular remodeling, manifested by an increment of the relative wall thickness. We investigated morphological and functional effects of short-term aerobic exercise at moderate intensity without diet restriction on cardiovascular apparatus in post-menopause women. Seventy-six post-menopausal healthy sedentary postwomen (56± 4 yrs) underwent clinical history, physician and anthropometric exam, 12-lead electrocardiography. Echocardiography was used to assess LV geometry and systolic and diastolic functions. Relative diastolic wall thickness (RWT), midwall fractional shortening (MFS) and arterial elastance (AE) were calculated to evaluate the LV concentric remodeling, the intrinsic systolic function and the vascular load, respectively. Data were collected before and after 14 weeks of moderate aerobic exercise training (four time per week). After the intervention program, systolic and diastolic arterial pressure, heart rate and hip circumference were significantly decreased (P = 0,01; P = 0,00; P = 0,00; P = 0,01, respectively). Left ventricular mass/height 2.7, ejection fraction and MFS were higher (p< 0,00; P= 0,00; P =0,00), while relative wall thickness (RWT) and AE were lower (P<0,03;P=0,00). Mitral E wave and E/A were higher (P = 0,001; P<0,0001). Left ventricular mass/height 2.7 was correlated to BMI (P = 0,04), WC (P = 0,034) and waist/hip ratio (P = 0,007). In post-menopause women aerobic exercise improves CV function (concentric remodelling, diastolic and systolic function) acting both on haemodynamic factors and body composition. Our data underline the role of non pharmacological interventions in the CV disease prevention.

Aerobic Exercise Training Improves Right- and Left Ventricular Systolic Function in Patients with COPD

Objective: The aim of this study was to investigate the effects of moderate continuous training (MCT) and high intensity aerobic interval training (AIT) on systolic ventricular function and aerobic capacity in COPD patients. Methods: Seventeen patients with COPD (64 ± 8 years, 12 men) with FEV1 of 52.8 ± 11% of predicted, were randomly assigned to isocaloric programs of MCT at 70% of max heart rate (HR) for 47 minutes) or AIT (∼90% of max HR for 4×4 minutes) three times per week for 10 weeks. Baseline cardiac function was compared with 17 age- and sex-matched healthy individuals. Peak oxygen uptake (VO2-peak) and left (LV) and right ventricular (RV) function examined by echocardiography, were measured at baseline and after 10 weeks of training. Results: At baseline, the COPD patients had reduced systolic function compared to healthy controls (p < 0.05). After the training, AIT and MCT increased VO2-peak by 8% and 9% and work economy by 7% and 10%, respectively (all p < 0.05). LV and RV systolic function both improved (p < 0.05), with no difference between the groups after the two modes of exercise training. Stroke volume increased by 17% and 20%, LV systolic tissue Doppler velocity (S’) by 18% and 17% and RV S’ by 15% after AIT and MCT, respectively (p < 0.05). Conclusion: Systolic cardiac function is reduced in COPD. Both AIT and MCT improved systolic cardiac function. In contrast to other patient groups studied, higher exercise intensity does not seem to have additional effects on cardiac function or aerobic capacity in COPD patients.

Hormonal Responses to Concurrent Strength and Endurance Training with Different Exercise Orders

The purpose of this study was to examine the influence of the intrasession sequencing of concurrent strength and aerobic training on the acute testosterone (TT) and cortisol (COR) responses. Ten recreationally strength-trained young men (23.5 ± 0.9 years) performed 2 exercise interventions: aerobic-strength (AS) and strength-aerobic (SA), which consisted of 30 minutes of aerobic exercise on a cycle ergometer at 75% of maximal heart rate and 3 sets of 8 repetitions at 75% of 1 repetition maximum (1RM) in 4 strength exercises. Maximal heart rate was determined using a maximal incremental test on a cycle ergometer. Blood samples were collected before, between exercise modalities, and immediately after the concurrent training sessions to determine basal and acute total TT and COR concentrations. There were significant increases in TT after the first modality in both exercise orders (p < 0.05). However, the TT level remained significantly higher than the resting levels after the second exercise modality only in the AS (p < 0.05) which resulted in a significant higher relative total change after the complete concurrent training session compared with SA (p < 0.05). Regarding COR, there were significant increases after the first modality in both AS and SA orders (p < 0.05), but the COR returned to resting levels after the second modality in both AS and SA interventions. During AS and SA, the change observed after the first modality performance was greater than that after the second in both hormones. The present results suggest that the TT response is optimized after the AS order, whereas both AS and SA produced similar hormonal levels at all time points. However, it is important to state that the present results should be applied only when short duration and moderate intensity aerobic training is performed.

Curcumin ingestion and exercise training improve vascular endothelial function in postmenopausal women

Vascular endothelial function is declines with aging and is associated with an increased risk of cardiovascular disease. Lifestyle modification, particularly aerobic exercise and dietary adjustment, has a favorable effect on vascular aging. Curcumin is a major component of turmeric with known anti-inflammatory and anti-oxidative effects. We investigated the effects of curcumin ingestion and aerobic exercise training on flow-mediated dilation as an indicator endothelial function in postmenopausal women. A total of 32 postmenopausal women were assigned to 3 groups: control, exercise, and curcumin groups. The curcumin group ingested curcumin orally for 8 weeks. The exercise group underwent moderate aerobic exercise training for 8 weeks. Before and after each intervention, flow-mediated dilation was measured. No difference in baseline flow-mediated dilation or other key dependent variables were detected among the groups. Flow-mediated dilation increased significantly and equally in the curcumin and exercise groups, whereas no changes were observed in the control group. Our results indicated that curcumin ingestion and aerobic exercise training can increase flow-mediated dilation in postmenopausal women, suggesting that both can potentially improve the age-related decline in endothelial function.

유산소 운동과 짐볼 운동이 비알코올성 지방간 비만아의 간 기능평가 지수와 Adipokine 및 심혈관 질환 위험인자에 미치는 영향

본 연구에서는 12주간 비알코올성 지방간을 가진 비만아동을 대상으로 유산소 운동군과 짐볼 운동군으로 나누어 운동을 실시한 결과 체중, BMI, 체지방율이 유의하게 감소하였다. 또한 Adiponectin의 증가와 Leptin의 감소로 인해 인슐린저항성과 혈당, 인슐린 농도도 유의하게 감소하는 것으로 나타났다. 또한 이러한 Adipokine들의 긍정적인 기능들로 인하여 비알콜성 지방간을 평가하는 간 기능 평가지수인 AST와 ALT도 감소하는 것으로 나타났다. 결론적으로 비알코올성 지방간을 가진 비만아동뿐만 아니라 비알코올성 지방간 환자에 있어 유산소운동 뿐만 아니라 짐볼 운동에서도 운동효과가 유사하게 나타났으므로 규칙적인 운동은 심폐체력 증진 및 혈중지질의 감소와 함께 혈중 Adiponectin 발현을 증가시킴으로서 인슐린저항성 개선을 통하여 비알코올성 지방간 기능 개선 뿐만 아니라 비만으로 인한 당뇨병, 심혈관 질환 발병의 예방에도 도움이 될 수 있을 것으로 기대된다. The aim of the present study was to investigate effects of a 12-week aerobic exercise training program and a gym-ball exercise training program on body composition, aspartate aminotransferase (AST), alanine aminotransferase (ALT), adipokines, and cardiovascular risk factors in obese children with nonalcoholic fatty liver disease. The subjects were separated into two groups, an aerobic exercise group (n=10), which practiced moderate aerobic exercise training for 12 weeks, and a gym-ball exercise group (n=13), which practiced resistance exercise training for 12 weeks. The results of the analyses are as follows: Weight, body mass index, and body fat were significantly lower (p<0.01, respectively), whereas the <TEX>$VO_2$</TEX> max was higher in both groups (p<0.01). Fasting glucose, insulin and HOMA-IR levels were significantly decreased in the gym-ball exercise group (p<0.05), whereas adiponectin, AST, and ALT levels were significantly increased (p<0.05, p<0.001, p<0.001, respectively) in both groups after the 12-week exercise training program. In addition, our results showed that HOMA-IR, insulin, and concentrations of C-reactive protein (CRP) were significantly lower in both groups. They demonstrate that a 12-week program of regular aerobic exercise or gym-ball exercise yields beneficial effects such as an amelioration of cardiovascular risk factors, body indices, and liver function in obese children with nonalcoholic fatty liver disease.

Effects of curcumin intake and aerobic exercise training on arterial compliance in postmenopausal women

BackgroundReduction in arterial compliance with aging increases the risk of cardiovascular disease. Lifestyle modification, particularly aerobic exercise and dietary modification, has a favorable effect on vascular aging. Curcumin, a major component of turmeric, is an anti-inflammatory agent. Therefore, it is plausible to hypothesize that curcumin improves arterial compliance. We investigated the effects of curcumin ingestion alone and in combination with aerobic exercise training on arterial compliance in postmenopausal women. MethodsA total of 51 postmenopausal women were assigned to 4 groups: placebo, curcumin, exercise and placebo (Ex + placebo), and exercise and curcumin (Ex + curcumin). Curcumin or placebo was ingested orally for 8 weeks. The exercise groups underwent moderate aerobic exercise training for 8 weeks. ResultsCarotid arterial compliance increased significantly in the curcumin, Ex + placebo, and Ex + curcumin groups, whereas no such changes were observed in the placebo control group. The magnitude of increases in carotid arterial compliance was the greatest in the Ex + curcumin group. ConclusionWe concluded that curcumin ingestion improves carotid arterial compliance and that the combination of curcumin and aerobic exercise training was more efficacious in increasing central arterial compliance than either of these treatments alone in postmenopausal women.

72. A role for beta 2-adrenergic receptor signaling in the exercise-induced re-distribution of Th cells within an asthmatic lung

Moderate aerobic exercise has been documented to modify the immune system, specifically, by mediating a re-distribution of Th cells in vivo . In addition, it is well-established that exercise generates the soluble Beta 2-adrenergic receptor (B2-AR) agonist, epinephrine, in which Th cells can respond by their expression of B2-AR. Studies using a luciferase reporter for OVA-specific Th cells in an OVA-sensitized/challenged allergic asthma mouse model have shown a reduction in OVA-specific Th cell migration into the lungs when exercised, subsequently reducing asthma pathogenesis. In addition, investigations looking at lung-homing chemokine receptor presence on the surface of Th cells (CCR4 and CCR8) by flow cytometry revealed no difference between exercised and sedentary asthmatic mice. However, transmigration experiments demonstrated that exercised Th cell chemokine receptors, CCR4 and CCR8, are less functional than their sedentary counterparts. These data suggest exercised Th cells are less responsive to lung-homing chemokine gradients created by an asthmatic lung. Furthermore, studies using B2-AR −/− Th cells transferred to OVA sensitized/challenged recipient mice, showed a loss in exercise-mediated chemokine receptor desensitization in transmigration assays comparing exercised and sedentary B2-AR −/− Th cells. These studies demonstrate that moderate aerobic exercise training can alter Th cell migration into the asthmatic lung by modifying chemokine receptor function. Additionally, the data suggests a role for B2-AR signaling in mediating this exercise-induced chemokine receptor loss of function.

Abstract 645: Aerobic Vs. Resistance Exercise Training In Ovariectomized Hypertensive Rats: Cardiovascular And Oxidative Stress Evaluations

Hypertension becomes more prevalent in menopause women. Aerobic exercise has been indicated as a nonpharmacological treatment for hypertension, however the benefits of resistance exercise are not well know. The purpose of the present study was to investigate the effects of aerobic or resistance exercise training on cardiovascular autonomic control and oxidative stress profile in ovariectomized hypertensive rats. Female spontaneously hypertensive rats (SHR) were divided into 4 groups (n=8 each): sedentary (HS), sedentary ovariectomized(HSO), aerobic trained ovariectomized (HATO) and resistance trained ovoriectomized (HRTO). The moderate intensity aerobic training (AT) was performed on a treadmill (8 weeks) and the moderate intensity resistance exercise training (RT) was performed on a vertical ladder with weights attached to the rat tail (8 weeks). Arterial pressure (AP) and heart rate (HR) were directly recorded and baroreflex sensitivity was evaluated by bradycardic (BR) and tachycardic responses (TR). Oxidative stress was evaluated in cardiac tissue by chemiluminescence, the ratio of glutathione reductase/glutathione oxidized (GSSG-GSH) and superoxide dismutase (SOD) and glutathione peroxidase (GPx) antioxidant enzyme activities. The exercise training induced a reduction in mean AP in trained groups compared to sedentary groups. HR was similar between groups. The AT increased TR in relation to other groups (HATO:-2.74±0.15 vs. HRTO: -1.42±0.2, HSO: -1.4±0.17 e HS -1.91±0.2 bpm/mmHg).However, BR was improved in both HATO (-1.38±0.07 bpm/mmHg) and HRTO (-1.34±0.05 bpm/mmHg) in relation to HS and HSO groups (-1.12±0.1 and -1.01±0.09 bpm/mmHg). Lipid peroxidation was reduced in trained groups in relation to sedentary groups (HRTO: 3538±168 and HATO: 4485±310 vs. HSO: 6514±547 and HS: 6661±566 cps/mg prot). The ratio GSSG-GSH did not differ between groups, however GSSG was higher in HATO group as compared to other groups (HATO: 346±14.5 vs. HRTO: 260±12, HSO:271±12, HS:234±11 μmol/g tissue) and GSH was lower in HRTO group as compared to HATO (HRTO:19±2 vs. HATO: 26±0.7 μmol/g tissue). SOD increased in HRTO in relation to sedentary groups (HRTO: 16.86±0.56 vs. HS:11.47±0.41, HSO: 11.17±0.41 USOD/mg prot) and GPx was higher in HRTO in relation to HSO (HRTO: 60±2.8 vs. HSO: 38.5±1.67 nmol/min/mg prot). In conclusion, aerobic or resistance exercise training induced a reduction in AP, associated with attenuation of baroreflex dysfunction and improvement in oxidative profile in cardiac tissue in ovariectomized hypertensive rats, suggesting a positive role of these nonpharmacological approachs in the management of cardiovascular risk in hypertension after hormones deprivation. Financial Support: FAPESP(2011/16441-0, 2011/15828-9,2010/17188-4)

Feasibility of exercising adults with asthma: a randomized pilot study

BackgroundAerobic exercise appears to have clinical benefits for many asthmatics, yet a complete understanding of the mechanisms underlying these benefits has not been elucidated at this time.PurposeThe objective of this study was to determine feasibility for a larger, future study that will define the effect of aerobic exercise on cellular, molecular, and functional measures in adults with mild-moderate asthma.DesignRecruited subjects were randomized into usual care (sedentary) or usual care with moderate intensity aerobic exercise treatment groups.Setting / ParticipantsNineteen adults with mild-moderate asthma but without a recent history of exercise were recruited at the UAB Lung Health Center, Birmingham, AL.InterventionThe exercise group underwent a 12 week walking program exercising at 60 – 75% of maximum heart rate (HRmax). Subjects self-monitored HRmax levels using heart rate monitors; exercise diaries and recreation center sign-in logs were also used.Main outcome measuresFunctional measures, including lung function and asthma control scores, were evaluated for all subjects at pre- and post-study time-points; fitness measures were also assessed for subjects in the exercise group. Peripheral blood and nasal lavage fluid were collected from all subjects at pre- and post-study visits in order to evaluate cellular and molecular measures, including cell differentials and eosinophilic cationic protein (ECP).ResultsSixteen subjects completed the prescribed protocol. Results show that subjects randomized to the exercise group adhered well (80%) to the exercise prescription and exhibited a trend toward improved fitness levels upon study completion. Both groups exhibited improvements in ACQ scores. No changes were observed in lung function (FEV1, FEV1/FVC), cell differentials, or ECP between groups.ConclusionsResults indicate that a moderate intensity aerobic exercise training program may improve asthma control and fitness levels without causing asthma deterioration in adult asthmatics. As such, these findings demonstrate the feasibility of the study protocol in preparation for a larger, clinical trial that will elucidate the functional consequences of aerobic exercise on asthmatic cellular and molecular responses.

중등도 유산소 운동이 비만아동의 adiponectin, RBP-4(retinol binding protein-4) 및 혈관 염증인자에 미치는 영향

본 연구는 비만아동을 대상으로 12주간 중강도 유산소 운동을 통해 신체조성, 아디포넥틴, RBP-4, 혈관염증인자에 미치는 영향을 규명하는데 목적이 있다. 대상자들은 두 집단으로, 운동군(n=15)은 12주간 중강도 유산소 운동을 실시하였고, 대조군(n=13)은 운동 프로그램에 참여하지 않았다. 운동군은 여유심박수 50%의 운동강도로 300 kcal에 도달할 때까지 트레드밀에서 런닝을 하였다. 연구결과는 다음과 같다 : 운동군이 통제군보다 체중, 체질량지수, 체지방률, 수축기 혈압과 이완기 혈압이 각각 유의하게 감소하는 것으로 나타났고(p<0.05), 최대산소섭취량은 운동군에서 높게 나타났다(p<0.05). 공복시 혈당, 인슐린과 인슐린저항성은 운동군에서 유의하게 감소하였고(p<0.05), 아디포넥틴은 12주 운동 후 운동군에서 유의하게 증가하였다(p<0.05). 또한, 혈중 RBP-4, CRP, IL-6 농도는 대조군보다 운동군에서 유의하게 감소하는 것으로 나타났다(p<0.05). 본 연구에서 12주간 규칙적인 유산소 운동 프로그램은 비만 아동들의 염증과 신체지수 개선에 긍정적인 역할을 하는 것으로 나타났다. The aim of the present study is to investigate the effects of 12 weeks-moderate aerobic exercise training on body composition, adiponectin, retinol-binding protein-4 (RBP-4), and vascular inflammation factors in obese children. The subjects were classified into two groups, one of which was an exercise group (n=15) practicing moderate aerobic exercise training for 12 weeks, and the other group, the control group (n=13), was not in that program. The exercise group participants performed on the treadmill running at heart rate reserve (HRR) 50% of exercise intensity for 300 kcal of the consumed time. The results of all the studies and inspections are as follows: Weight, body mass index, body fat, and systolic and diastolic blood pressure were significantly lower, while <TEX>$VO_2$</TEX> max was higher in the exercise group than in the control group (p<0.05, respectively). Fasting glucose, insulin, and HOMA-IR levels in the exercise group were significantly decreased (p<0.05), whereas adiponectin levels in the exercise group were significantly increased after 12 weeks' exercise training (p<0.05). In addition, our results showed that RBP4, C-reactive protein (CRP), and interleukin-6 (IL-6) concentrations in the exercise group were significantly lower than those of the control group (p<0.05). This investigation has shown that a 12 weeks-regular aerobic exercise program offers useful effects such as an amelioration of inflammation and body indices in obese children.