Results 11 to 20 of about 778,421 (286)

Determination of Effect of Oral Vitamin D to Improve Ventilatory Threshold in Healthy Young Adults with Vitamin D Deficiency [PDF]

open access: yesNovelty in Biomedicine, 2019
Background: Many studies have shown a high prevalence of vitamin D deficiency in different communities. Due to multiple roles of vitamin D in the body, this study was aimed to determine the effect of oral vitamin D3 on ventilatory threshold-1 in a ...
Amir Safarzadeh   +4 more
doaj   +2 more sources

Beyond the second ventilatory threshold: The prevalence and reliability of a second respiratory compensation point and third ventilatory threshold. [PDF]

open access: yes, 2023
Respiratory data obtained from cardiopulmonary exercise testing is commonly used to study ventilatory thresholds (VT). Traditionally, these thresholds correspond to two physiological transition points where the cardiorespiratory and metabolic systems ...
Teale, Jodie Emily
core   +3 more sources

Does ‘sub-threshold’ ventilatory stress promote healing after lung injury?

open access: yesIntensive Care Medicine Experimental
Excessive tidal stretching may initiate damage or retard healing after lung injury. However, it is seldom considered whether intracycle power and ventilatory forces of lesser magnitude than those required to cross an injury threshold might stimulate or ...
John J. Marini   +2 more
doaj   +2 more sources

A mathematical model of the human respiratory system during exercise [PDF]

open access: yes, 2009
This paper describes a respiratory control system model and the associated computer simulations for human subjects during incremental exercise, involving work rates from zero up to the highest level in the heavy exercise domain.
Thamrin, H., Murray-Smith, D.J.
core   +7 more sources

Validity and Reliability of Ventilatory and Blood Lactate Thresholds in Well-Trained Cyclists. [PDF]

open access: yesPLoS ONE, 2016
PURPOSE:The purpose of this study was to determine, i) the reliability of blood lactate and ventilatory-based thresholds, ii) the lactate threshold that corresponds with each ventilatory threshold (VT1 and VT2) and with maximal lactate steady state test (
Jesús G Pallarés   +4 more
doaj   +1 more source

Reliability of threshold determination using portable muscle oxygenation monitors during exercise testing: a systematic review and meta-analysis

open access: yesScientific Reports, 2023
Over the last few years, portable Near-Infrared Spectroscopy (NIRS) technology has been suggested for determining metabolic/ventilator thresholds. This systematic review and meta-analysis aimed to assess the reliability of a portable muscle oxygenation ...
Carlos Sendra-Pérez   +5 more
doaj   +1 more source

Breakpoints in Ventilation, Cerebral and Muscle Oxygenation, and Muscle Activity During an Incremental Cycling Exercise

open access: yesFrontiers in Physiology, 2014
The aim of this study was to locate the breakpoints of cerebral and muscle oxygenation and muscle electrical activity during a ramp exercise in reference to the first and second ventilatory thresholds.
Sebastien eRacinais   +2 more
doaj   +1 more source

The effects of 5 days β-alanine supplementation on the velocity and the percentage o2max at the lactate threshold [PDF]

open access: yes, 2010
Purpose: To assess the effect of 5 days β-alanine supplementation on the velocity and the percentage of O2max ¬¬ (%O2max) at the lactate threshold (Tlac) during treadmill running.
Johnson, Matthew
core   +2 more sources

Physiological and perceptual responses during self-regulated exercise in children with cystic fibrosis [PDF]

open access: yes, 2011
Purpose: To examine the physiological and perceptual responses during self-regulated exercise in children with cystic fibrosis (CF). Methods: Twelve children (10.8 ± 2.0 y) with CF made 3 separate visits to the research laboratory in the school of ...
Britton, Fionnuala
core   +2 more sources

Is there an acute exercise-induced physiological/biochemical threshold which triggers increased speed of cognitive functioning? A meta-analytic investigation

open access: yesJournal of Sport and Health Science, 2015
Purpose: The purpose of this study was to examine, using meta-analytic measures, the evidence regarding the optimal exercise intensity at which improvements in speed of cognitive function are triggered.
Terry McMorris, Beverley J. Hale
doaj   +1 more source

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