RESUMO
A combination of yoga and blood flow restriction, each of which elicits marked pressor responses, may further increase blood pressure and myocardial oxygen demand. To determine the impact of a combination of yoga and blood flow restriction on hemodynamic responses, twenty young healthy participants performed 20 yoga poses with/without blood flow restriction bands placed on both legs. At baseline, there were no significant differences in any of the variables between the blood flow restriction and non-blood flow restriction conditions. Blood pressure and heart rate increased in response to the various yoga poses (p<0.01) but were not different between the blood flow restriction and non-blood flow restriction conditions. Rate-pressure products, an index of myocardial oxygen demand, increased significantly during yoga exercises with no significant differences between the two conditions. Rating of perceived exertion was not different between the conditions. Blood lactate concentration was significantly greater after performing yoga with blood flow restriction bands (p=0.007). Cardio-ankle vascular index, an index of arterial stiffness, decreased similarly after yoga exercise in both conditions while flow-mediated dilation remained unchanged. In conclusion, the use of lower body blood flow restriction bands in combination with yoga did not result in additive or synergistic hemodynamic and pressor responses.
Assuntos
Pressão Sanguínea , Hemodinâmica , Condicionamento Físico Humano/métodos , Fluxo Sanguíneo Regional , Coxa da Perna/irrigação sanguínea , Yoga , Adolescente , Adulto , Estudos Cross-Over , Endotélio Vascular/fisiologia , Feminino , Frequência Cardíaca , Humanos , Ácido Láctico/sangue , Masculino , Miocárdio/metabolismo , Consumo de Oxigênio , Percepção/fisiologia , Condicionamento Físico Humano/fisiologia , Esforço Físico/fisiologia , Rigidez Vascular , Vasodilatação , Adulto JovemAssuntos
Anestesia Geral/métodos , Anestesia Local/métodos , Malformações Arteriovenosas/cirurgia , Síndrome do Hamartoma Múltiplo/cirurgia , Dor Pós-Operatória/tratamento farmacológico , Doenças Raras/cirurgia , Procedimentos Cirúrgicos Vasculares/efeitos adversos , Analgesia Epidural/métodos , Anestesia Geral/instrumentação , Anestésicos Locais/administração & dosagem , Determinação da Pressão Arterial/métodos , Criança , Ecocardiografia , Endoscopia do Sistema Digestório/efeitos adversos , Síndrome do Hamartoma Múltiplo/diagnóstico por imagem , Humanos , Máscaras Laríngeas , Laringoscópios , Laringoscopia/instrumentação , Laringoscopia/métodos , Imageamento por Ressonância Magnética , Masculino , Monitorização Intraoperatória/métodos , Dor Pós-Operatória/etiologia , Doenças Raras/diagnóstico por imagem , Coxa da Perna/irrigação sanguínea , Coxa da Perna/cirurgiaRESUMO
Hotfiel, T, Swoboda, B, Krinner, S, Grim, C, Engelhardt, M, Uder, M, and Heiss, R. Acute effects of lateral thigh foam rolling on arterial tissue perfusion determined by spectral Doppler and power Doppler ultrasound. J Strength Cond Res 31(4): 893-900, 2017-Foam rolling has been developed as a popular intervention in training and rehabilitation. However, evidence on its effects on the cellular and physiological level is lacking. The aim of this study was to assess the effect of foam rolling on arterial blood flow of the lateral thigh. Twenty-one healthy participants (age, 25 ± 2 years; height, 177 ± 9 cm; body weight, 74 ± 9 kg) were recruited from the medical and sports faculty. Arterial tissue perfusion was determined by spectral Doppler and power Doppler ultrasound, represented as peak flow (Vmax), time average velocity maximum (TAMx), time average velocity mean (TAMn), and resistive index (RI), and with semiquantitative grading that was assessed by 4 blindfolded investigators. Measurement values were assessed under resting conditions and twice after foam rolling exercises of the lateral thigh (0 and 30 minutes after intervention). The trochanteric region, mid portion, and distal tibial insertion of the lateral thigh were representative for data analysis. Arterial blood flow of the lateral thigh increased significantly after foam rolling exercises compared with baseline (p ≤ 0.05). We detected a relative increase in Vmax of 73.6% (0 minutes) and 52.7% (30 minutes) (p < 0.001), in TAMx of 53.2% (p < 0.001) and 38.3% (p = 0.002), and in TAMn of 84.4% (p < 0.001) and 68.2% (p < 0.001). Semiquantitative power Doppler scores at all portions revealed increased average grading of 1.96 after intervention and 2.04 after 30 minutes compared with 0.75 at baseline. Our results may contribute to the understanding of local physiological reactions to self-myofascial release.
Assuntos
Terapia de Tecidos Moles/métodos , Coxa da Perna/irrigação sanguínea , Coxa da Perna/fisiologia , Adulto , Velocidade do Fluxo Sanguíneo , Feminino , Hemodinâmica , Humanos , Masculino , Coxa da Perna/diagnóstico por imagem , Ultrassonografia , Ultrassonografia DopplerRESUMO
The influence of temperature on the hemodynamic adjustments to direct passive heat stress within the leg's major arterial and venous vessels and compartments remains unclear. Fifteen healthy young males were tested during exposure to either passive whole body heat stress to levels approaching thermal tolerance [core temperature (Tc) + 2°C; study 1; n = 8] or single leg heat stress (Tc + 0°C; study 2; n = 7). Whole body heat stress increased perfusion and decreased oscillatory shear index in relation to the rise in leg temperature (Tleg) in all three major arteries supplying the leg, plateauing in the common and superficial femoral arteries before reaching severe heat stress levels. Isolated leg heat stress increased arterial blood flows and shear patterns to a level similar to that obtained during moderate core hyperthermia (Tc + 1°C). Despite modest increases in great saphenous venous (GSV) blood flow (0.2 l/min), the deep venous system accounted for the majority of returning flow (common femoral vein 0.7 l/min) during intense to severe levels of heat stress. Rapid cooling of a single leg during severe whole body heat stress resulted in an equivalent blood flow reduction in the major artery supplying the thigh deep tissues only, suggesting central temperature-sensitive mechanisms contribute to skin blood flow alone. These findings further our knowledge of leg hemodynamic responses during direct heat stress and provide evidence of potentially beneficial vascular alterations during isolated limb heat stress that are equivalent to those experienced during exposure to moderate levels of whole body hyperthermia.
Assuntos
Transtornos de Estresse por Calor/fisiopatologia , Perna (Membro)/irrigação sanguínea , Perna (Membro)/fisiopatologia , Fluxo Sanguíneo Regional/fisiologia , Adulto , Velocidade do Fluxo Sanguíneo/fisiologia , Regulação da Temperatura Corporal/fisiologia , Artéria Femoral/fisiopatologia , Veia Femoral/fisiopatologia , Hemodinâmica/fisiologia , Temperatura Alta , Humanos , Hipertermia Induzida/métodos , Masculino , Coxa da Perna/irrigação sanguínea , Coxa da Perna/fisiologia , Adulto JovemRESUMO
OBJECTIVE: Erectile dysfunction (ED) is a major complication in diabetes mellitus. A novel method, high-tone external muscle stimulation (HTEMS), has been proven to be useful in the therapy of diabetic and uremic peripheral polyneuropathy. The aim of this study was to test the potential effect of HTEMS on ED in diabetic patients. DESIGN: An open-label, self-controlled interventional prospective study was conducted at the 2nd Department of Internal Medicine and N.C. University of Pécs, Hungary. Six Type 2 diabetic patients (mean age 59 ± 7 years) with severe ED (International Index of Erectile Function (IIEF) score: 7.7 ± 8.5) and impaired renal function (eGFR: 61 ± 16 ml/min) were involved. INTERVENTION: The thigh muscles of the patients were treated with HTEMS for 1 h 3 times per week for a duration of 4 weeks. MAIN OUTCOME MEASURES: Penile peak systolic velocity (PSV) (in the flaccid state and semi-rigid (after 10 mg intracavernous papaverine injection)), IIEF score, quality of life and laboratory parameters. At the beginning also the acute effect of HTEMS on penile PSV was investigated. RESULTS: Under basal conditions penile PSV was rather low. The first HTEMS session of the thighs induced an insignificant increase of PSV in the flaccid state (4.1 ± 1.2 to 6.3 ± 3.3 cm/s) and a significant rise of PSV in the semi-rigid penis (from 6.5 ± 2.5 to 8.9 ± 2.2 cm/s (p = 0.009)). After 4 weeks of HTEMS treatment, under basal conditions no significant change of penile PSV (flaccid and semirigid) was observed. Similarly, IIEF score did not improve over the time period (7.7 ± 8.1 vs. 6.7 ± 8.5, p > 0.05). Also, metabolic parameters and eGFR were not influenced. CONCLUSION: In a pilot study of diabetic patients with severe ED HTEMS of the thighs induced an acute rise of penile PSV in the semi-rigid state. However, after 4 weeks of HTEMS therapy the basal PSV and symptoms of ED were not improved.
Assuntos
Terapia por Estimulação Elétrica/métodos , Disfunção Erétil/terapia , Pênis/irrigação sanguínea , Doenças do Sistema Nervoso Periférico/terapia , Fluxo Sanguíneo Regional/fisiologia , Uremia/complicações , Idoso , Velocidade do Fluxo Sanguíneo/fisiologia , Neuropatias Diabéticas/terapia , Disfunção Erétil/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Doenças do Sistema Nervoso Periférico/etiologia , Projetos Piloto , Índice de Gravidade de Doença , Coxa da Perna/irrigação sanguínea , Resultado do TratamentoRESUMO
As part of the assessment of the Odstock functional electrical stimulation (FES) standing system for mid to low thoracic lesion spinal cord injured (SCI) subjects, cardiac output, high blood flow and quadriceps muscle thickness were measured before and following an electrical stimulation muscle retraining programme. The same parameters were also measured in a group of uninjured subjects and in SCI subjects. It was found that there was no difference in cardiac output between the groups. However thigh blood flow was found to be around 65% of normal values in the spinally injured group. This returned to normal values following the retraining programme. The quadriceps muscle wasted to approximately 50% of its original thickness in the first 3 weeks following spinal cord injury. The retraining programme increased the muscle thickness to near normal values.