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Effects of Acute Hypobaric Hypoxia Exposure on Cardiovascular Function in Unacclimatized Healthy Subjects: A "Rapid Ascent" Hypobaric Chamber Study
28 avril 2022, THEUNISSEN, Sigrid; BALESTRA, Costantino; Bolognési, Sébastien; Borgers, Guy; Vissenaeken, Dirk; Obeid, Georges; Germonpré, Peter; Honoré, Patrick M.; De Bels, David,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Background: This study aimed to observe the effects of a fast acute ascent to simulated high altitudes on cardiovascular function both in the main arteries and in peripheral circulation. Methods: We examined 17 healthy volunteers, between 18 and 50 years old, at sea level, at 3842 m of hypobaric hypoxia and after return to sea level. Cardiac output (CO) was measured with Doppler transthoracic ...
Oxidative Stress Response Kinetics after 60 Minutes at Different (1.4 ATA and 2.5 ATA) Hyperbaric Hyperoxia Exposures
02 août 2023, Leveque, Clément; Mrakic-Sposta, Simona; THEUNISSEN, Sigrid; Germonpré, Peter; LAMBRECHTS, Kate; Vezzoli, Alessandra; Bosco, Gerardo; Levenez, Morgan; Lafère, Pierre; Guerrero, François; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Hyperbaric oxygen therapy (HBOT) is a therapeutical approach based on exposure to pure oxygen in an augmented atmospheric pressure. Although it has been used for years, the exact kinetics of the reactive oxygen species (ROS) between different pressures of hyperbaric oxygen exposure are still not clearly evidenced. In this study, the metabolic responses of hyperbaric hyperoxia exposures for 1 h at ...
Oxidative Stress Response Kinetics after 60 Minutes at Different Levels (10% or 15%) of Normobaric Hypoxia Exposure
15 juin 2023, Leveque, Clément; Mrakic-Sposta, Simona; THEUNISSEN, Sigrid; Germonpré, Peter; LAMBRECHTS, Kate; Vezzoli, Alessandra; Gussoni, Maristella; Levenez, Morgan; Lafère, Pierre; Guerrero, François; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
In this study, the metabolic responses of hypoxic breathing for 1 h to inspired fractions of 10% and 15% oxygen were investigated. To this end, 14 healthy nonsmoking subjects (6 females and 8 males, age: 32.2 ± 13.3 years old (mean ± SD), height: 169.1 ± 9.9 cm, and weight: 61.6 ± 16.2 kg) volunteered for the study. Blood samples were taken before, and at 30 min, 2 h, 8 h, 24 h, and 48 h after a 1 ...
The effect of a passive stretch training protocol on performance during a drop jump in humans
30 mars 2013, Levenez, Morgan; THEUNISSEN, Sigrid; Bottero, Antoine; SNOECK, Thyl; Tinlot, Arnaud; BALESTRA, Costantino; Provyn, Steven,
- 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 ...
Oxidative Stress Response’s Kinetics after 60 Minutes at Different (30% or 100%) Normobaric Hyperoxia Exposures
30 décembre 2022, Leveque, Clément; Mrakic-Sposta, Simona; Lafère, Pierre; Vezzoli, Alessandra; Germonpré, Peter; Beer, Alexandre; Mievis, Stéphane; Virgili, Fabio; LAMBRECHTS, Kate; THEUNISSEN, Sigrid; Guerrero, François; BALESTRA, Costantino,
- 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 ...
ULTRASONOGRAPHIC ASSESSMENT OF NECK MUSCULAR SIZE AND RANGE OF MOTION IN RUGBY PLAYERS
01 février 2018, HEMELRYCK, Walter; Calistri, Josselin; Papadopoulou, Virginie; THEUNISSEN, Sigrid; Dugardeyn, Christian; BALESTRA, Costantino,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Background: World Rugby Union laws are constantly evolving towards stringent injury-prevention, particularly for contested scrums, since front row players are most at risk of cervical spine injuries. Recently, some countries have also introduced tailored training programs and minimum performance requirements for playing in the front row. Nevertheless, these approaches lack an objective assessment ...
Variation of Cognitive Function During a Short Stay at Hypobaric Hypoxia Chamber (Altitude: 3842 M)
26 juin 2019, De Bels, David; Pierrakos, Charalampos; Bruneteau, Adrien; Reul, François; Crèvecoeur, Quentin; Marrone, Nicolas; Vissenaeken, Dirk; Borgers, Guy; Balestra, Costantino; Honoré, Patrick M.; THEUNISSEN, Sigrid,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Objective: To observe the effects of a fast-acute ascent to high altitude on brain cognitive function and transcranial doppler parameters in order to understand the physiological countermeasures of hypoxia.
Methods: 17 high-altitude-naïve male subjects (mean age was 26.3 ± 8.1 years) participated in the study. We measured Critical Flicker Fusion Frequency (CFFF), blood oxygen saturation, Psychology ...
Pre-dive Whole-Body Vibration Better Reduces Decompression-Induced Vascular Gas Emboli than Oxygenation or a Combination of Both
30 novembre 2016, BALESTRA, Costantino; THEUNISSEN, Sigrid; Papadopoulou, Virginie; Le Mener, Cédric; GERMONPRÉ, Peter; Guerrero, François; Lafère, Pierre,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Purpose: Since non-provocative dive profiles are no guarantor of protection against decompression sickness, novel means including pre-dive "preconditioning" interventions, are proposed for its prevention. This study investigated and compared the effect of pre-dive oxygenation, pre-dive whole body vibration or a combination of both on post-dive bubble formation. Methods: Six healthy volunteers performed ...
Effect of tetrahydrobiopterin and exercise training on endothelium-dependent vasorelaxation in SHR
02 juin 2013, Guerrero, François; Sanéo, Thioub; Goanvec, Christelle; THEUNISSEN, Sigrid; Feray, Annie; BALESTRA, Costantino; Mansourati, Jacques,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
We examined whether the improvement of impaired NO-dependent vasorelaxation by exercise training could be mediated through a BH4-dependent mechanism. Male spontaneously hypertensive rats (SHR, n = 20) and Wistar-Kyoto rats (WKY, n = 20) were trained (Tr) for 9 weeks on a treadmill and compared to age-matched sedentary animals (Sed). Endothelium-dependent vasorelaxation (EDV) was assessed with ...
The effect of a passive stretch training protocol on performance during a drop jump in humans
15 juin 2013, Lévénez, Morgan; THEUNISSEN, Sigrid; Bottero, Antoine; SNOECK, Thyl; Bruyère, A; Tinlot, Arnaud; BALESTRA, Costantino; Provyn, Steven,
- HE Bruxelles Brabant
,
- Article scientifique
Article scientifique
Aim: 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, ...