Nitric oxide (NO) plays a crucial role in muscle oxidative capacity, which predicts muscle strength. This study aimed to investigate whether different breathing techniques (nasal or oral breathing) affect muscle performance during acute exhaustive exercise.

Introduction/Background Various organizations are evaluating their protocols for handling fatal dive accidents. However, the lack of data sharing between multiple entities, namely med-ical examiners and-researchers, remains a challenge in understanding these fatalities. This study aimed to evaluate the data obtained by different parties du ring investigations and assess how that data can be shared to facilitate more accurate analyses.

Introduction/Background The estimated death rate among rebreather divers is high at 1.8 to 3.8 deaths per 100,000 rebreather dives, and the activity popularity is growing. A previous ep-idemiological study from the French Navy has shown that among 54 divers who lost consciousness during a dive, none died, and only two had a moderate water inspiration while using a Mouthpiece Retaining Strap (MRS) in a dive team configuration. However, recreational and technical divers express less willingness to use a MRS. Drowning is a major cause of death among them. Therefore, our main objective during this study was to better understand the use of MRS among divers and to evaluate the possible correlation between prop-er training with the MRS and its voluntary use.

Introduction: Long COVID syndrome is a major health issue. Multiple treatments have been proposed but efficacy is inadequately investigated. Hyperbaric oxygen therapy (HBOT) has been promoted based on a small number of publications. As there is potential for a placebo effect and the financial cost of HBOT is high, we sought to investigate the effects of HBOT in Long COVID in a randomised trial.

Introduction: Rebreather diving carries a high fatality rate (estimated 1.8–3.8 deaths per 100,000 dives), yet its popularity is growing. Among 54 French military divers who lost consciousness underwater, none died when using a mouthpiece retaining strap (MRS) in a team diving setup. Despite this, MRS use remains limited among recreational divers for whom drowning is a major cause of death. This study assessed knowledge, perceptions, and training regarding MRS use within the rebreather diving community.