This clinical trial is focused on studying the effects of a treatment called Hyperbaric Oxygen Therapy on individuals with an acute hamstring injury. An acute hamstring injury is a sudden injury to the muscles at the back of the thigh, often causing pain and difficulty in movement. The treatment involves using oxygen in a special way, where it is delivered under higher pressure than normal, which is believed to help in healing the injury faster.

The study will use two forms of oxygen: Conoxia, 100% v/v, medicinal gas, compressed and Conoxia® Vloeibaar, 100% v/v, medicinal gas, cryogenic. Both forms of oxygen are administered through inhalation, meaning participants will breathe in the oxygen. The main goal of the study is to compare how quickly athletes and military personnel can return to their activities after receiving this treatment, compared to those who receive standard care.

Participants in the study will undergo seven daily sessions of hyperbaric oxygen therapy. The study will also collect information on various aspects of recovery, such as pain levels, physical examination results, and MRI findings, which is a type of imaging that helps visualize the injury. Additionally, the study will monitor for any re-injuries and any adverse events that may occur during the treatment period. The trial aims to provide insights into whether this therapy can effectively speed up recovery from hamstring injuries.