Effect of an Ultra-Endurance Event on Cardiovascular Function and Cognitive Performance in Marathon Runners.

Background: Ultra-marathon running participation has become increasingly more popular in recent years; however, there is inconclusive evidence concerning the effects of participation on cognition and cardiovascular function. The purpose of this study was to examine alterations in cardiovascular function and cognitive performance and their association in ultra-marathon runners prior to and following an ultra-endurance event.

Methods: In total, 24 runners (19 males and 5 females) participated in an ultra-marathon race (FatDog120) held in British Columbia, Canada.

Exercise oscillatory ventilation during autonomic blockade in young athletes and healthy controls.

Purpose: Exercise oscillatory ventilation (EOV) is a form of periodic breathing that is associated with a poor prognosis in heart failure patients, but little is known about EOV in other populations. We sought to provide insights into the phenomenon of EOV after it was observed in young healthy subjects, including athletes, after the administration of dual autonomic blockade (DAB).

Methods: From 29 participants who completed cardiopulmonary exercise testing (CPET) with and without DAB (0.

Depression scores improve with continuous positive airway pressure in specialized sleep clinics: real-world data.

Study Objectives: To assess changes in Hospital Anxiety and Depression Scale (HADS) scores after continuous positive airway pressure (CPAP) in patients with obstructive sleep apnea.

Methods: Consecutive patients attending the Alfred Health sleep clinic, diagnosed with obstructive sleep apnea, and prescribed CPAP were recruited. The primary outcome was a change in the HADS depression (HADS-D) and anxiety (HADS-A) subscales from the time of diagnosis to follow-up.

The association between heart rate variability, reaction time, and indicators of workplace fatigue in wildland firefighters.

Purpose: To understand the association between heart rate variability and indices of fatigue, total sleep time, and reaction time in shift workers.

Methods: Ten participants from the British Columbia Wildfire Service management team were examined over a 14-day active fire-line period. Daily measures of subjective fatigue, sleepiness, and alertness were recorded using a visual analog scale.

Fatigue and sleep patterns among Canadian wildland firefighters during a 17-day fire line deployment.

The purpose of this investigation was to enhance our understanding of the effects the current British Columbia Wildfire Service (BCWS) firefighting schedule have on the development of fatigue and sleep deprivation. This was a cohort study that objectively and subjectively measured sleep quantity, sleep quality, and fatigue throughout a 17-day British Columbia wildland firefighting deployment. Wildland firefighters (n = 30) conducted daily testing of sleep and fatigue measures during 14 days of activity on the fire line and three days immediately post deployment during their three-day rest period, for a total of 17 days of data collection.

Consecutive nursing shifts and the risk of hypoglycemia in critically ill patients who are receiving intravenous insulin: a multicenter study.

Study Objectives: Intensive care unit nurses commonly work multiple consecutive 12-hour shifts that leave little time for sleep between work shifts. Working multiple consecutive shifts could compromise vigilance and patient care, especially with respect to managing high-risk medications such as insulin infusions. We hypothesized that as the number of consecutive shifts worked by nurses increases, the rate of hypoglycemia in patients who are receiving an insulin infusion would also increase.

Validity of the Elite HRV Smartphone Application for Examining Heart Rate Variability in a Field-Based Setting.

Perrotta, AS, Jeklin, AT, Hives, BA, Meanwell, LE, and Warburton, DER. Validity of the elite HRV smartphone application for examining heart rate variability in a field-based setting. J Strength Cond Res 31(8): 2296-2302, 2017-The introduction of smartphone applications has allowed athletes and practitioners to record and store R-R intervals on smartphones for immediate heart rate variability (HRV) analysis.

A respiratory-gated micro-CT comparison of respiratory patterns in free-breathing and mechanically ventilated rats.

In this study, we aim to quantify the differences in lung metrics measured in free-breathing and mechanically ventilated rodents using respiratory-gated micro-computed tomography. Healthy male Sprague-Dawley rats were anesthetized with ketamine/xylazine and scanned with a retrospective respiratory gating protocol on a GE Locus Ultra micro-CT scanner. Each animal was scanned while free-breathing, then intubated and mechanically ventilated (MV) and rescanned with a standard ventilation protocol (56 bpm, 8 mL/kg and PEEP of 5 cm HO) and again with a ventilation protocol that approximates the free-breathing parameters (88 bpm, 2.

The influence of race length on arterial compliance following an ultra-endurance marathon.

There is inconclusive evidence concerning the effects of routine participation in ultra-endurance events on cardiovascular disease (CVD) risk. Arterial compliance is a reliable, non-invasive, and effective tool for evaluating CVD risk. The purpose of this research was to examine if race length influences acute changes in arterial compliance following an ultra-marathon event.