For athletes, recovery is not simply about getting back to training quickly.  It is about creating the biological conditions that allow injured tissue to repair properly, while maintaining as much function and conditioning as possible.

Hyperbaric Oxygen Therapy (HBOT) is increasingly being investigated as an important addition to sports rehabilitation because it combines two important therapeutic variables:  high oxygen availability and increased atmospheric pressure.

The pressure component is particularly important.  HBOT is not simply 'breathing more oxygen'.  The increase in pressure changes the partial pressure of oxygen and, consequently, the amount of oxygen that can be dissolved directly into plasma.

The pressure gradient: the fundamental mechanism

Oxygen naturally moves from areas of higher oxygen partial pressure towards areas of lower partial pressure.  This creates what is often described as the oxygen cascade - from inspired air, to the lungs, arterial blood, capillaries, interstitial fluid and ultimately the cells and mitochondria where oxygen is consumed.

Under normal conditions, oxygen tension progressively falls as oxygen moves from the arterial circulation towards tissue and cellular compartments.

HBOT dramatically increased the oxygen partial pressure within the blood.  At 2.0 ata while breathing 10L of concentrated oxygen, arterial tension can rise to well above 1,000 mmHg, compared with approximately 90-100 mmHg when breathing air at sea level.  This creates a substantially steeper oxygen diffusion gradient between the vascular compartment and surrounding tissues.

This is important because delivery to injured tissue is not determined solely by how much oxygen is carried by haemoglobin.  Under hyperbaric conditions, a much greater quantity of oxygen is physically dissolved in plasma.

As the pressure increased, plasma-dissolved oxygen increases.  The resulting increase in tissue oxygen tension allows oxygen to diffuse further from the microcirculation into areas where oxygen delivery may otherwise be limited.

In simple terms: pressure helps create the gradient that drives oxygen from the blood towards the tissue.

This is particularly relevant to sports injuries involving tissue with relatively limited vascularity or areas where swelling, trauma or inflammation has compromised normal microcirculation.

Why this matters after a sports injury

Following an acute muscle, tendon or ligament injury, the local environment can become hypoxic and metabolically stressed.  Swelling and changes in microcirculation can further affect oxygen availability.

Oxygen is required for numerous processes involved in tissue repair, including:

• fibroblast activity

• collagen synthesis

• extracellular matrix formation

• angiogenesis and vascular remodelling

• cellular energy production

• immune and inflammatory regulation

• tissue remodelling

HBOT temporarily produces a hyperoxic environment that supports these oxygen-dependent processes.

Research examining the physiological effects of HBOT has identified increased tissue oxygenation, reduced oedema, modulation of inflammation and effects on vascular and cellular signalling as potential mechanisms relevant to musculoskeletal recovery.

What does the research show in athletes?

A 2019 review specifically examining HBOT in sports musculoskeletal injuries concluded that HBOT shows good potential as an adjunct to rehabilitation, but also emphasised the need for further research to establish which injuries and treatment protocols benefit most.

More recently, a clinical trial involving 41 athletes with exercise-related muscular injuries found that athletes receiving 10 HBOT sessions experienced reductions in pain as well as reductions in biochemical markers associated with muscle injury, including creatine phosphokinase and myoglobin.

A 2026 systemic review and meta-analysis provides some of the strongest recent evidence.  It analysed 10 studies involving 299 participants and found that HBOT significantly accelerated recovery from exercise-induced muscle injury.  Benefits were observed in both college students and elite athletes.

Interestingly, the analysis found beneficial effects across different treatment pressures, including protocols at and below 2.0 ata and those above 2.0 ata.  This means the research does not currently establish that 2.0 ata is universally superior for athletic injuries.

Why pressure may be particularly relevant to poorly perfused tissue

Not all musculoskeletal tissues have the same blood supply.  Some structures involved in sports injuries - including portions of tendons, cartilage, ligaments and certain areas of fibrocartilaginous tissue - have relatively limited vascularity compared with highly perfused muscle.

This is where the pressure gradient becomes particularly important.

The objective is not simply to increase oxygen in the bloodstream.  It is to increase the oxygen partial pressure sufficiently to establish a stronger driving force for oxygen movement from the circulation towards the surrounding tissue.

At 2.0 ata, 10L oxygen, the increase in arterial oxygen tension and plasma-dissolved oxygen is substantial.  Physiological literature describes this increased oxygen tension as producing a greater diffusion gradient from the vascular compartment into tissue.

Muscle, tendon, and ligament repair

The healing of musculoskeletal injuries is a complex, staged process.

Muscle repair involved inflammation, satellite-cell activation, regeneration and remodelling.  Tendons and ligaments depend heavily on fibroblast activity and the production and organisation of collagen and extracellular matrix.

Preclinical research has reported effects of HBOT on collagen synthesis, vascularisation, matrix organisation and mechanical properties in tendon and ligament injury models.  A 2026 systematic review of animal studies found promising effects across several musculoskeletal tissues.

A separate 2026 systematic review of human musculoskeletal studies examined 19 studies involving 612 patients.  It found the most consistent clinical evidence in bone-related conditions such as bone marrow oedema and avascular necrosis, while evidence for muscle, tendon and ligament injuries remained mixed.

The biological mechanisms are compelling, but the clinical response is likely to depend on the tissue, injury, timing, treatment pressure and overall rehabilitation programme.

For professional athletes HBOT is increasingly being utilised alongside physiotherapy, progressive loading, nutrition and sleep.  HBOT provides a different stimulus:  temporarily increasing oxygen availability and tissue oxygen tension while also influencing cellular signalling and the inflammatory environment.  

Adding HBOT to help support critical stages of inflammation control and tissue repair seems a common-sense approach to providing a biologically supportive environment to ensure optimal tissue healing in optimal time.

Selected international research

• Luo X, Uu Y, Zhang S, Qi F. Effects of Hyperbaric Oxygen Therapy on Exercise-Induced Muscle Injury and Soreness:  A Systematic Review and Meta-analysis.  Archives of Physical Medicine and Rehabilitation.  2026; 107 (3): 522-532.

• Effects of hyperbaric oxygen therapy on human musculoskeletal pathologies in clinical studies:  a systematic review.  BMC Musculoskeletal Disorders.  2026.  19 studies; 612 participants.

• Moghadam N, Hieda M, Ramey L, Levine BD, Guilliod R.  Hyperbaric Oxygen Therapy in Sports Musculoskeletal Injuries.  Medicine and Science in Sports and Exercise.

• Barata P, Cervaens M, Resende R, Camacho O, Marques F. Hyperbaric Oxygen Effects on Sports Injuries.

• Early Recovery of Exercise-Related Muscular Injury in HBOT.  Clinical trial involving 41 athletes.

• Effects of hyperbaric oxygen therapy on bone, muscle, cartilage, tendon and ligaments in animal studies:  a systematic review.  BMC Musculoskeletal Disorders.  2026.