Outdoor exercisers are frequently exposed to diesel exhaust (DE) that contains particulate matter (PM) air pollution. How the respiratory and metabolic responses exercise affected by DE exposure how these change with intensity unknown.This study aimed determine low- high-intensity cycling containing high levels of PM.Eighteen males age 24.5 ± 6.2 yr performed 30-min trials low-intensity (30% power at V˙O2peak) (60% as well rest. Each trial was once while breathing filtered (FA) (300 μg·m...

Exposure to air pollution impairs aspects of pulmonary and autonomic function causes inflammation. However, how exercising in affects these indices is poorly understood. Therefore, the purpose this study was determine effects low-intensity high-intensity cycling with diesel exhaust (DE) exposure on function, heart rate variability (HRV), fraction exhaled nitric oxide (FeNO), norepinephrine symptoms. Eighteen males performed 30-min trials or (30 60% power at VO2peak) a resting control...

Purpose: To determine the effect of pre-exercise exposure to diesel exhaust (DE) on 20-km cycling performance, pulmonary function, and cardio-respiratory variables during exercise.

Introduction Exposure to air pollution impairs aspects of endothelial function such as flow-mediated dilation (FMD). Outdoor exercisers are frequently exposed pollution, but how exercising in affects and these effects modified by exercise intensity poorly understood. Objectives Therefore, the purpose this study was determine low-intensity high-intensity cycling with diesel exhaust (DE) exposure on FMD, blood pressure, plasma nitrite nitrate (NOx) endothelin-1. Methods Eighteen males...

Background : Regular physical activity and higher cardiorespiratory (CR) fitness enhance immune function, possibly reducing coronavirus disease 2019 (COVID-19) infection severity. The aim was to assess the association between self-reported CR on COVID-19 characteristics. Methods Participants formerly testing positive for completed an online questionnaire measuring characteristics complications, level, activity, sociodemographic health-related Self-reported determined as pace cover 4.8 km...

Air pollution inhaled dose is the product of pollutant concentration and minute ventilation ([Formula: see text]). Previous studies have parameterized relationship between [Formula: text] variables such as heart rate (HR) observed substantial inter-subject variability. In this paper, we evaluate a method to estimate with easy-to-measure in an analysis pooled-data from eight independent studies. We compiled large diverse data set that balanced respect age, sex fitness level. used linear mixed...

Background: With a warming climate, extreme wildfires are more likely to occur, which may adversely affect air quality, physical activity (PA), and therefore, mental well-being. Methods: We assessed PA engagement well-being between periods with without wildfire smoke, whether there were associations changes in behavior Questionnaires on during period of smoke completed by 348 participants; these participants, 162 also follow-up questionnaire smoke. Data analyzed using generalized/linear...

The aim of the present study was to analyze effects traffic-related air pollution (TRAP) on markers inflammatory, neuroplasticity, and endurance performance-related parameters in recreationally trained cyclists who were adapted TRAP during a 50-km cycling time trial (50-km TT). Ten male performed TT inside an environmental chamber located downtown Sao Paulo (Brazil), under or filtered conditions. Blood samples obtained before after measure inflammatory [interleukin-6 (IL-6), C-reactive...

Blueberries are abundant with anthocyanins possessing antioxidant and anti-inflammatory properties. As these properties combat fatigue promote recovery, blueberry supplementation may enhance performance recovery. Thus, the objectives were to examine effects of two protocols on running performance, physiological responses, short-term Using a randomized, double-blind, placebo (PLA)-controlled crossover design, 14 runners completed an 8-km time trial (TT) after 4 days blueberries (4DAY), PLA,...

Exposure to particulate matter 2.5 μm or less (PM2.5) that contains transition metals may play a role in systemic oxidative stress and inflammation. diesel exhaust (DE) can increase adhesion molecules, which are important the inflammatory response; however, it is unclear how exercising DE affects molecules exercise intensity modulates this response. To determine exposure during of varying intensities markers Eighteen males performed 30 min cycling bouts at low high (30% 60% power VO2peak...

Background Blueberries are concentrated with anthocyanins possessing antioxidant properties. As these properties counter fatigue, blueberry supplementation may improve performance and recovery, particularly in hypoxia, where oxidative stress is elevated.Methods This study examined the effects of on running performance, physiological responses, recovery normobaric hypoxia. Eleven experienced runners completed a 30-minute time-trial (TT) hypoxia (%O2 = 15.5 %) separate days after four...

The purpose of this study was to determine the effects short-term normoxic and hypoxic exercise on plasma endothelin-1 nitric oxide levels, relationship arterial compliance pulmonary artery pressure endothelin-1. Seven endurance-trained males completed two incremental steady-state tests performed at ventilatory threshold in normoxia hypoxia (fraction inspired oxygen = 0.14). Plasma endothelin-1was measured throughout tests. Arterial using applanation tonometry, Doppler echocardiography were...

Until recently, treatments for chronic pain commonly relied on in-person interventions, and despite more hybrid care options today, capacity delivery remains challenged. Digital programs focusing the psychosocial aspects of may provide low-barrier alternatives.

Outdoor exercisers are frequently exposed to air pollution. How the endothelium responds exercise in pollution, and how these responses change with intensity is unknown. The purpose of this study was determine endothelial low‐ high‐intensity cycling diesel exhaust (DE) exposure. Eighteen males aged 24.56.2 yrs performed 30‐minute trials low (30% power at VO 2peak ) (60% cycling, rest. For each subject, trial once breathing filtered (FA) DE (300ug/m 3 PM 2.5 for a total six trials, separated...

INTRODUCTION: Exposure to diesel exhaust (DE) prior exercise increases heart rate and attenuates exercise-induced bronchodilation. However, the effects of combined with air pollution on pulmonary function variability (HRV) are unclear. Furthermore, it is often assumed that in intensity will increase dose pollution, thus magnifying resultant health effects. how DE HRV modulated by unknown. PURPOSE: To determine low- high-intensity cycling HRV. METHODS: Eighteen males performed 30-minute...

Particulate matter air pollution (PM) causes lung inflammation, systemic inflammation and endothelial dysfunction, however the effect of PM on endurance performance is unknown. With international sports competitions being held in cities with high levels PM, it important to understand physiological implications this. PURPOSE: Determine pre-exposure dilute diesel exhaust (DE) 20km time trial (TT) performance, cardio-respiratory responses during exercise function. METHODS: Seven...

Purpose: To investigate the influence of hyperthermia on ventilatory responses to isocapnic hypoxia (iHVR). Methods and Study Design: Four males volunteered for study that was approved by SFU Office Research Ethics. Each participant instrumented esophageal surface skin temperatures had his expired gases analyzed indirect calorimetry. The protocol included two iHVR trials, one in normothermia hyperthermia. Prior each trial rested a seated position 30 min. This period ended with collection 5...