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Low Cardiorespiratory Fitness Post-COVID-19: A Narrative Review
AbstractPatients recovering from COVID-19 often report symptoms of exhaustion, fatigue and dyspnoea and present with exercise intolerance persisting for months post-infection. Numerous studies investigated these sequelae and their possible underlying mechanisms using cardiopulmonary exercise testing. We aimed to provide an in-depth discussion as well as an overview of the contribution of selected organ systems to exercise intolerance based on the Wasserman gears. The gears represent the pulmonary system, cardiovascular system, and periphery/musculature and mitochondria. Thirty-two studies that examined adult patients post-...
Source: Sports Medicine - September 17, 2022 Category: Sports Medicine Source Type: research

Poststroke White Matter Hyperintensities and Physical Activity: A CANVAS Study Exploratory Analysis
Conclusions Meeting PA guidelines was associated with lower WMH volume at 12 months in univariable analysis, but not in multivariable analysis. Age consistently predicted greater WMH volume.
Source: Medicine and Science in Sports and Exercise - August 19, 2022 Category: Sports Medicine Tags: CLINICAL SCIENCES Source Type: research

Low Stroke Volume during Exercise with Hot Skin Is Due to Elevated Heart Rate
Conclusions The increase in HR rather than an increase in CBF or forearm venous volume was responsible for the decrease in SV during moderate-intensity exercise when Tsk was held at 38°C.
Source: Medicine and Science in Sports and Exercise - September 17, 2019 Category: Sports Medicine Tags: BASIC SCIENCES Source Type: research

The Mechanoreflex and Hemodynamic Response to Passive Leg Movement in Heart Failure
Background: Sensitization of mechanosensitive afferents, which contribute to the exercise pressor reflex, has been recognized as a characteristic of patients with heart failure (HF); however, the hemodynamic implications of this hypersensitivity are unclear. Objectives: The present study used passive leg movement (PLM) and intrathecal injection of fentanyl to blunt the afferent portion of this reflex arc to better understand the role of the mechanoreflex on central and peripheral hemodynamics in HF. Methods: Femoral blood flow (FBF), mean arterial pressure, femoral vascular conductance, HR, stroke volume, cardiac output,...
Source: Medicine and Science in Sports and Exercise - February 19, 2016 Category: Sports Medicine Tags: Basic Sciences Source Type: research

The Effect of Water Immersion during Exercise on Cerebral Blood Flow
We examined the hypothesis that exercise during immersion augments cerebral blood flow velocity compared with intensity-matched land-based exercise. Methods: Fifteen normotensive participants were recruited (26 ± 4 yr, 24.3 ± 1.9 kg·m−2). We continuously assessed mean arterial blood pressure, HR, stroke volume, oxygen consumption, and blood flow velocities through the middle and posterior cerebral arteries before, during, and after 20-min bouts of water- and land-based stepping exercise of matched intensity. The order in which the exercise conditions were performed was randomized between subjects. Water-based exercise...
Source: Medicine and Science in Sports and Exercise - January 20, 2015 Category: Sports Medicine Tags: Basic Sciences Source Type: research