Consulta: subjectFacets:"Aerobic exercise"
Registros recuperados: 9
Data/hora: 08/06/2024 01:27:34

Effect of Swimming Training on the Rectus Abdominis Muscle of rats: Morphological and Histochemical Aspects
Provedor de dados: International Journal of Morphology
Autores: Alvarez Rosa,Maria José; Dal Pai,Vitalino; Bremer Neto,Hermann; Azoubel,Reinaldo; Nouailhetas,Viviane Louise Andree.
We investigated the effect of swimming training in rats on morphological characteristics, hypertrophy levels and metabolic and contractile adaptations of different fiber types in rat the rectus abdominis muscle. Rats were randoverly assigned to one of three groups (N = 5 each): a) swimming training for 1 h, twice a week (2x/w), b) 1 h five times a week (5x/w) for 9 consecutive weeks, or c) without any swimming training (Control). Body weight increased in 2x/w rats and decreased in the 5x/w ones. Muscle fiber diameters increased in both trained groups, with higher values in the 2x/w group. Aerobic exercise increased slow oxidative (SO) + fast-oxidative-glycolytic (FOG) fibers and decreased fast glycolytic (FG) fibers. In addition, SO fibers were increased...
Tipo: Journal article
Palavras-chave: Aerobic exercise; Type fibers; Muscle.
Ano: 2007
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000300027

200.000 IU of vitamin D does not reduce resting Blood Pressure and Inhibit Post-Exercise Hypotension in elderly women: a pilot study
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: GONÇALVES,MARIA DA CONCEIÇÃO R.; MIRANDA NETO,MANOEL; CAVALCANTE,ISA G.M.; SEBADELHE,VITTÓRIA R.R.J.; SOUZA,MICHELE F. De; NEVES,JULIANA P.R.; SOUZA,FLAVIA T.L. DE; TAVARES,RENATA L.; COSTA,MATHEUS S.; SILVA,ALEXANDRE S.
Abstract  Given the scarcity of studies with elderly and the existence of studies investigating the effect of vitamin D supplementation in PEH (post exercise hypotension), this study evaluated the effect of a single megadose of vitamin D on resting blood pressure (RBP) and post-exercise hypotension (PEH) in the elderly. 11 hypertensive elderly women (70.3 ± 1.7 years) received a single megadose of 200.000 IU of cholecalciferol or a placebo, orally, through capsules. On day 7, the subjects performed 30 minutes of aerobic exercise with blood pressure measurement before exercise and every 10 minutes after exercise during 60 minutes, besides cardiac autonomic modulation. RBP did not significantly change. Exercise promoted significant systolic PEH only in one...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic exercise; Aged; Hypertension; Hypotension; Cholecalciferol.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100903

Effects of age and physical activity on the autonomic control of heart rate in healthy men
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Melo,R.C.; Santos,M.D.B.; Silva,E.; Quitério,R.J.; Moreno,M.A.; Reis,M.S.; Verzola,I.A.; Oliveira,L.; Martins,L.E.B.; Gallo-Junior,L.; Catai,A.M.
The effects of the aging process and an active life-style on the autonomic control of heart rate (HR) were investigated in nine young sedentary (YS, 23 ± 2.4 years), 16 young active (YA, 22 ± 2.1 years), 8 older sedentary (OS, 63 ± 2.4 years) and 8 older active (OA, 61 ± 1.1 years) healthy men. Electrocardiogram was continuously recorded for 15 min at rest and for 4 min in the deep breathing test, with a breath rate of 5 to 6 cycles/min in the supine position. Resting HR and RR intervals were analyzed by time (RMSSD index) and frequency domain methods. The power spectral components are reported in normalized units (nu) at low (LF) and high (HF) frequency, and as the LF/HF ratio. The deep breathing test was analyzed by the respiratory sinus arrhythmia...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Heart rate variability; Respiratory sinus arrhythmia; Autonomic nervous system; Aging process; Aerobic exercise.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000900007

Intensity of swimming exercise influences aortic reactivity in rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Brito,A.F.; Silva,A.S.; Souza,I.L.L.; Pereira,J.C.; Silva,B.A. da.
Exercise is known to cause a vasodilatory response; however, the correlation between the vasorelaxant response and different training intensities has not been investigated. Therefore, this study evaluated the vascular reactivity and lipid peroxidation after different intensities of swimming exercise in rats. Male Wistar rats (aged 8 weeks; 250-300 g) underwent forced swimming for 1 h whilst tied to loads of 3, 4, 5, 6, and 8% of their body weight, respectively (groups G3, G4, G5, G6 and G8, respectively; n=5 each). Immediately after the test, the aorta was removed and suspended in an organ bath. Cumulative relaxation in response to acetylcholine (10−12-10−4 M) and contraction in response to phenylephrine (10−12-10−5 M) were measured. Oxidative stress was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic exercise; Anaerobic exercise; Lipid peroxidation; Smooth muscle; Swimming; Vessel.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015001100996

Influence of exercise modality on agreement between gas exchange and heart rate variability thresholds
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Cunha,F.A.; Montenegro,R.A.; Midgley,A.W.; Vasconcellos,F.; Soares,P.P.; Farinatti,P.
The main purpose of this study was to investigate the level of agreement between the gas exchange threshold (GET) and heart rate variability threshold (HRVT) during maximal cardiopulmonary exercise testing (CPET) using three different exercise modalities. A further aim was to establish whether there was a 1:1 relationship between the percentage heart rate reserve (%HRR) and percentage oxygen uptake reserve (   %    V ˙ O 2 R) at intensities corresponding to GET and HRVT. Sixteen apparently healthy men 17 to 28 years of age performed three maximal CPETs (cycling, walking, and running). Mean heart rate and       V ˙ O 2 at GET and HRVT were 16 bpm (P&lt;0.001) and 5.2 mL·kg-1·min-1 (P=0.001) higher in running than cycling, but no significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic exercise; Autonomic nervous system; Heart rate reserve; Oxygen uptake reserve; Poincare plot; Ramp protocol.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000800706

Bradykinin, insulin, and glycemia responses to exercise performed above and below lactate threshold in individuals with type 2 diabetes
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Asano,R.Y.; Browne,R.A.V.; Sales,M.M.; Arsa,G.; Moraes,J.F.V.N.; Coelho-Júnior,H.J.; Moraes,M.R.; Oliveira-Silva,I.; Atlas,S.E.; Lewis,J.E.; Simões,H.G.
The aim of this study was to analyze the acute responses of bradykinin, insulin, and glycemia to exercise performed above and below lactate threshold (LT) in individuals with type 2 diabetes mellitus (T2D). Eleven participants with a diagnosis of T2D randomly underwent three experimental sessions 72 h apart: 1) 20 min of exercise performed at 120% of LT (120%LT), 2) 20 min of exercise performed at 80% of LT (80%LT), and 3) 20 min of control session. Blood glucose was analyzed before, during, and at 45 min post-exercise. Bradykinin and insulin were analyzed before and at 45 min post-exercise. Both exercise sessions elicited a parallel decrease in glucose level during exercise (P≤0.002), with a greater decrease being observed for 120%LT (P=0.005). Glucose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metabolic disease; Aerobic exercise; Peptide; Insulin resistance.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017001100607

Oxygen uptake, respiratory exchange ratio, or total distance: a comparison of methods to equalize exercise volume in Wistar rats
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Paes,L.S.; Borges,J.P.; Cunha,F.A.; Souza,M.G.C.; Cyrino,F.Z.G.A.; Bottino,D.A.; Bouskela,E.; Farinatti,P.
This study compared strategies to equalize the volume of aerobic exercise performed with different intensities by Wistar rats, based on the distance covered during exercise bouts and energy expenditure (EE, isocaloric sessions) obtained from oxygen uptake (V̇O2) or respiratory exchange ratio (RER). Thirty-three male rats (270.5±12.8 g) underwent maximal exercise tests to determine V̇O2 reserve (V̇O2R), being randomly assigned to three groups: moderate-intensity continuous exercise at speed corresponding to 50% V̇O2R (MIC; n=11); high-intensity continuous exercise at 80% V̇O2R (HIC; n=11); and high-intensity intermittent exercise (HII; n=11) at 60% V̇O2R (3 min) and 80% V̇O2R (4 min). Exercise duration was calculated individually to elicit EE of 5 kcal in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy expenditure; Aerobic exercise; Exercise testing; Metabolism; Fitness.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000800607

Strength and power training did not modify cardiovascular responses to aerobic exercise in elderly subjects
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Queiroz,A.C.C.; Chehuen,M.R.; Costa,L.A.R.; Wallerstein,L.F.; Mello,M.T.; Ugrinowitsch,C.; Forjaz,C.L.M.
Resistance training increases muscle strength in older adults, decreasing the effort necessary for executing physical tasks, and reducing cardiovascular load during exercise. This hypothesis has been confirmed during strength-based activities, but not during aerobic-based activities. This study determined whether different resistance training regimens, strength training (ST, constant movement velocity) or power training (PT, concentric phase performed as fast as possible) can blunt the increase in cardiovascular load during an aerobic stimulus. Older adults (63.9 ± 0.7 years) were randomly allocated to: control (N = 11), ST (N = 13, twice a week, 70-90% 1-RM) and PT (N = 15, twice a week, 30-50% 1-RM) groups. Before and after 16 weeks, oxygen uptake (VO2),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aging; Resistance training; Maximal exercise test; Aerobic exercise.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000900006

Chronic aerobic exercise associated to low-dose L-NAME improves contractility without changing calcium handling in rat cardiomyocytes
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Luchi,T.C.; Coelho,P.M.; Cordeiro,J.P.; Assis,A.L.E.M.; Nogueira,B.V.; Marques,V.B.; dos Santos,L.; Lima-Leopoldo,A.P.; Lunz,W.; Leopoldo,A.S.
Nitric oxide (NO) inhibition by high-dose NG-nitro-L-arginine methyl ester (L-NAME) is associated with several detrimental effects on the cardiovascular system. However, low-dose L-NAME increases NO synthesis, which in turn induces physiological cardiovascular benefits, probably by activating a protective negative feedback mechanism. Aerobic exercise, likewise, improves several cardiovascular functions in healthy hearts, but its effects are not known when chronically associated with low-dose L-NAME. Thus, we tested whether the association between low-dose L-NAME administration and chronic aerobic exercise promotes beneficial effects to the cardiovascular system, evaluating the cardiac remodeling process. Male Wistar rats were randomly assigned to control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitric oxide; Aerobic exercise; Cardiac remodeling; Cardiomyocyte; Calcium.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300611