The purpose of this study was to examine the effects of 6 weeks of localized, muscle-focused (quadriceps femoris) passive heat therapy (PHT) on resistance artery function, exercise haemodynamics and exercise performance relative to knee extension (KE) exercise training (EX). We randomized 34 healthy adults (ages 18-36; n = 17 female, 17 male) to receive either PHT or sham heating sessions (120 min, 3 days/week), or EX (40 min, 3 days/week) over 6 weeks. Blood flow was assessed with Doppler ultrasound of the femoral artery during both passive leg movement (PLM) and a KE graded exercise test. Muscle biopsies were taken from the vastus lateralis at baseline and after 6 weeks. Peak blood flow during PLM increased to the same extent in both the EX (∼10.5% increase, P = 0.009) and PHT groups (∼8.5% increase, P = 0.044). Peak flow during knee extension exercise increased in EX (∼19%, P = 0.005), but did not change in PHT (P = 0.523) and decreased in SHAM (∼7%, P = 0.020). Peak vascular conductance during KE increased by ∼25% in EX (P = 0.030) and PHT (P = 0.012). KE peak power increased in EX by ∼27% (P = 0.001) but did not significantly change in PHT and SHAM groups. Expression of endothelial nitric oxide synthase increased significantly in both EX (P = 0.028) and PHT (P = 0.0095), but only EX resulted in increased angiogenesis. In conclusion, 6 weeks of localized PHT improved resistance artery function at rest and during exercise to the same extent as exercise training but did not yield significant improvements in performance. KEY POINTS: Many for whom exercise would be most beneficial are either unable to exercise or have a very low exercise tolerance. In these cases, an alternative treatment to combat declines in resistance artery function is needed. We tested the hypothesis that passive heat therapy (PHT) would increase resistance artery function, improve exercise haemodynamics and enhance exercise performance compared to a sham treatment, but less than aerobic exercise training. This report shows that 6 weeks of localized PHT improved resistance artery function at rest and during exercise to the same extent as exercise training but did not improve exercise performance. Additionally, muscle biopsy analyses revealed that endothelial nitric oxide synthase expression increased in both PHT and exercise training groups, but only exercise resulted in increased angiogenesis. Our data demonstrate the efficacy of applying passive heat as an alternative treatment to improve resistance artery function for those unable to receive the benefits of regular exercise.
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http://dx.doi.org/10.1113/JP286567 | DOI Listing |
Taiwan J Ophthalmol
November 2024
Department of Ophthalmology, KVG Medical College and Hospital, Sullia, Karnataka, India.
Purpose: The present study aimed to assess the impact of diabetes mellitus and smoking in orbital vessels, utilizing resistive index (RI) through color Doppler imaging (CDI).
Materials And Methods: The cross-sectional study consisted of 90 participants divided into three groups of 30 each. Group A consisted of normal individuals, Group B consisted of patients with diabetes, and Group C consisted of patients with a history of diabetes and smoking.
Infect Drug Resist
January 2025
Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China.
Purpose: To investigate the molecular epidemiology and risk factors of carbapenem-resistant (CRKP) infection.
Patients And Methods: Patient's clinical data and CRKP strains were collected from November 2017 to December 2018 at a tertiary hospital in Wuhan, China. The antimicrobial susceptibilities, carbapenem-resistant genes, multi-locus sequence typing (MLST), homologous analysis, and risk factors for CRKP were determined.
Several studies explored the associations of pre-albumin (PA)/albumin (ALB) and ALB-combined indicators (prognostic nutrition index [PNI], albumin-to-globulin ratio [AGR], bilirubin-to-albumin [BAR], and C-reactive protein/albumin ratio [CAR]) with intravenous immunoglobulin (IVIG) resistance and coronary artery lesions (CALs) in Kawasaki disease (KD) patients. However, the results were controversial. A meta-analysis was conducted to reconfirm their associations and predictive performance.
View Article and Find Full Text PDFJ Med Ultrasound
February 2024
Department of Obstetrics and Gynecology, Faculty of Medicine, Karadeniz Technical University, Ortahisar, Trabzon, Turkey.
Background: The effect of congenital cardiac malformation on fetal cerebral circulation has not been well known. This study aimed to compare the cerebral blood circulation of fetuses with congenital heart disease (CHD) with healthy fetuses.
Methods: This prospective cohort study included 37 pregnant women who presented to the gynecology and obstetrics department of department of Farabi Hospital, Faculty of Medicine, Karadeniz Technical University for anomaly screening in the second trimester.
Eur Heart J
January 2025
Department of Primary Care and Public Health, Imperial Centre for Cardiovascular Disease Prevention, School of Public Health, Imperial College London, White City Campus, 90 Wood Lane, London W12 0BZ, UK.
Background And Aims: Overweight and obesity are modifiable risk factors for atherosclerotic cardiovascular disease (ASCVD) in the general population, but their prevalence in individuals with heterozygous familial hypercholesterolaemia (HeFH) and whether they confer additional risk of ASCVD independent of LDL cholesterol (LDL-C) remains unclear.
Methods: Cross-sectional analysis was conducted in 35 540 patients with HeFH across 50 countries, in the EAS FH Studies Collaboration registry. Prevalence of World Health Organization-defined body mass index categories was investigated in adults (n = 29 265) and children/adolescents (n = 6275); and their association with prevalent ASCVD.
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