Résultat de
votre recherche
Voici les éléments 21-30 de 87
Architectural and Mechanical Changes after Five Weeks of Intermittent Static Stretch Training on the Medial Gastrocnemius Muscle of Active Adults
27 mars 2023,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
We investigated the effects of intermittent long-term stretch training (5 weeks) on the architectural and mechanical properties of the muscle-tendon unit (MTU) in healthy humans. MTU's viscoelastic and architectural properties in the human medial gastrocnemius (MG) muscle and the contribution of muscle and tendon structures to the MTU lengthening were analyzed. Ten healthy volunteers participated ...
Oxygen Variations-Insights into Hypoxia, Hyperoxia and Hyperbaric Hyperoxia - Is the Dose the Clue?
20 septembre 2023,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
on, nitrogen and hydrogen); aerobic organisms depend on it to release energy from carbon-based molecules. The concentration of oxygen in the atmosphere is ~20.93–20.95% (209–460 ppm), but this has fluctuated markedly throughout geological history. It stabilized within a habitable range, between ~15% and 35%, which has been maintained from the Cambrian period 540 million years ago until today [1].
The ...
Heart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?
13 août 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Heart rate variability (HRV) during underwater diving has been infrequently investigated because of environment limitations and technical challenges. This study aims to analyze HRV changes while diving at variable hyperoxia when using open circuit (OC) air diving apparatus or at constant hyperoxia using a closed-circuit rebreather (CCR). We used HRV analysis in time and frequency domain ...
Comparison of insulation provided by dry or wetsuits among recreational divers during cold water immersion (< 5 degrees C)
05 octobre 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
BACKGROUND: Divers thermal status influences susceptibility to decompression sickness hence the need for proper insulation during immersion in cold water. However, there is a lack of data on thermal protection provided by diving suits, hence this study. MATERIALS AND METHODS: Two different groups of divers wearing either a wetsuit (n = 15) or a dry suit (n = 15) volunteered for this study. Anthropometric ...
Comparison of insulation provided by dry or wetsuits among recreational divers during cold water immersion (< 5 degrees C)
05 octobre 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
BACKGROUND: Divers thermal status influences susceptibility to decompression sickness hence the need for proper insulation during immersion in cold water. However, there is a lack of data on thermal protection provided by diving suits, hence this study. MATERIALS AND METHODS: Two different groups of divers wearing either a wetsuit (n = 15) or a dry suit (n = 15) volunteered for this study. Anthropometric ...
The "ON-OFF" Switching Response of Reactive Oxygen Species in Acute Normobaric Hypoxia: Preliminary Outcome
16 février 2023,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Exposure to acute normobaric hypoxia (NH) elicits reactive oxygen species (ROS) accumulation, whose production kinetics and oxidative damage were here investigated. Nine subjects were monitored while breathing an NH mixture (0.125 F(I)O(2) in air, about 4100 m) and during recovery with room air. ROS production was assessed by Electron Paramagnetic Resonance in capillary blood. Total antioxidant ...
Oxidative Stress Response’s Kinetics after 60 Minutes at Different (30% or 100%) Normobaric Hyperoxia Exposures
30 décembre 2022,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Oxygen is a powerful trigger for cellular reactions and is used in many pathologies,
including oxidative stress. However, the effects of oxygen over time and at different partial pressures
remain poorly understood. In this study, the metabolic responses of normobaric oxygen intake
for 1 h to mild (30%) and high (100%) inspired fractions were investigated. Fourteen healthy nonsmoking subjects (7 ...
Heart Rate Variability During a Standard Dive: A Role for Inspired Oxygen Pressure?
13 août 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Introduction: Heart rate variability (HRV) during underwater diving has been infrequently investigated because of environment limitations and technical challenges. This study aims to analyze HRV changes while diving at variable hyperoxia when using open circuit (OC) air diving apparatus or at constant hyperoxia using a closed-circuit rebreather (CCR). We used HRV analysis in time and frequency domain ...
A fully automated method for late ventricular diastole frame selection in post-dive echocardiography without ECG gating
02 mars 2021,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Venous gas emboli (VGE) are often quantified as a marker of decompression stress on echocardiograms. Bubble-counting has been proposed as an easy to learn method, but remains time-consuming, rendering large dataset analysis impractical. Computer automation of VGE counting following this method has therefore been suggested as a means to eliminate rater bias and save time. A necessary step for this ...
The effect of a passive stretch training protocol on performance during a drop jump in humans
30 mars 2013,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Our study's aim is to show how a five-week stretch training protocol, based on passive stretching, can change muscle performance during a drop jump (stretch shortening cycle). METHODS: This study observes in 8 healthy subjects (four males and four females), the effect of a 5-week passive stretch training protocol on the stretch shortening cycle (SSC) during the performance of a drop jump, and identify ...