Muscle recovery for athletes: the basics, and what hyperbaric chamber research shows

Most of what helps muscles recover after hard training is unglamorous: sleep, food and not doing too much too soon. Hyperbaric chambers sit at the other end of the scale. They are expensive, visible and popular in elite sport, which makes it easy to assume they work.

This guide sets out the basics first, then what controlled studies of hyperbaric oxygen for muscle recovery actually found, including the results that were disappointing.

What actually helps muscle recovery?

Soreness that appears in the days after hard or unfamiliar exercise is known as delayed onset muscle soreness, or DOMS. Recovering from it, and from the wider stress of training, depends mainly on three things you control.

Sleep. A 2021 expert consensus in the British Journal of Sports Medicine found that elite athletes are particularly susceptible to poor sleep, often habitually sleeping under 7 hours a night with fragmented sleep. Athletic performance is reduced by a night or more without sleep, and in the wider population habitually sleeping under 7 hours increases susceptibility to respiratory infection. The authors recommend an individual approach based on the athlete's own perceived sleep needs, rather than one fixed target for everyone.

Protein and total energy. The International Society of Sports Nutrition position stand says an overall daily intake of 1.4 to 2.0 g of protein per kg of body weight is sufficient for most exercising people. It suggests doses of about 0.25 g per kg, or 20 to 40 g, spread every 3 to 4 hours across the day. It also describes total protein and calorie intake as the most important consideration for adapting to resistance training, with the timing of a shake mattering far less.

Training load. The International Olympic Committee consensus statement on load states that poor load management is a major risk factor for injury. It defines load broadly: rapid changes in training and competition, congested fixture calendars, psychological stress and travel all count. In plain terms, a sudden jump in training after a break, or a crowded run of matches, is itself a recovery problem.

None of these is exciting, and none can be bought in a single session. They are also where the evidence is strongest.

Why do elite athletes use hyperbaric chambers?

Hyperbaric oxygen therapy (HBOT) means breathing concentrated oxygen inside a pressurised chamber, which increases the amount of oxygen dissolved in the blood. What HBOT is explains the physiology in more detail.

The appeal for sport is intuitive. Oxygen is involved in tissue repair, so more oxygen might mean faster recovery from hard training or knocks. Seeing a chamber at a training ground does not tell you whether it works.

The useful question is narrower: when researchers compared HBOT with a control group, did people recover faster?

What did controlled studies of hyperbaric oxygen for muscle recovery find?

The research is small, the results are mixed, and the pressures used matter.

The Cochrane review, 2005. The Cochrane review of HBOT for delayed onset muscle soreness and closed soft tissue injury included nine small randomised trials with 219 participants. Seven studied muscle soreness induced by unaccustomed exercise and two studied ankle or knee ligament injuries. The reviewers found insufficient evidence to establish the effects of HBOT on either. When the seven soreness trials were pooled, pain was significantly and consistently higher in the HBOT groups at 48 and 72 hours, by a mean of 0.88 points on a 0 to 10 scale at 48 hours. The review dates from 2005, so newer trials are not included.

The pressures in those trials. A 2011 review of HBOT and sports injuries sets out the muscle soreness trials in detail. They gave 100% oxygen at 2.0 ATA or 2.5 ATA, usually for 60 minutes, and in one trial for 100 minutes at 2.5 ATA with three 30-minute oxygen periods. The authors concluded that larger randomised, controlled, double-blind trials are needed.

HBOT before or after exercise, 2021. A systematic review and meta-analysis in Frontiers in Physiology included 10 studies with 166 participants, six of which (69 participants) could be pooled. It concluded that hyperbaric oxygen before or after exercise had no significant effect on performance or recovery.

Exercise-induced muscle damage, 2025. A meta-analysis in Archives of Physical Medicine and Rehabilitation pooled 10 randomised trials with 299 participants. It reported that HBOT statistically accelerated recovery from exercise-induced muscle injury, with benefits in subgroups above 2.0 ATA and at or below 2.0 ATA. The same analysis found HBOT did not reduce exercise-induced muscle soreness overall, and the soreness subgroups pointed in different directions.

Read together, the fairest summary is this. Some trial measures of muscle damage may recover faster, soreness does not reliably improve, and one older pooled analysis found more short-term pain. A statistical change in a trial measure is also not the same thing as returning to training or playing sooner.

Is a hyperbaric chamber allowed in sport?

The WADA Prohibited List bans artificially enhancing the uptake, transport or delivery of oxygen, but that section excludes supplemental oxygen by inhalation. WADA's guidance says supplemental oxygen given by inhalation, but not intravenously, is permitted, and that athletes must check the rules with the sporting authorities governing the events they compete in.

We cannot give a ruling for your sport. If you are drug tested, ask your governing body before you book.

Should you try a hyperbaric chamber for muscle recovery?

That is your decision, and it should be an informed one. If you still want to try it, this is the honest framing.

• Start with the basics. Sleep, protein, total energy and load management have a stronger evidence base than any chamber.
• Expect no performance promise. We do not claim that HBOT improves muscle recovery, performance or return to play. Our chamber runs at 1.5 ATA, lower than most of the trials above, so their results cannot be assumed to apply.
• Think about tolerability. Pressure changes affect the ears and sinuses. A current infection, congestion or difficulty clearing your ears can make a session uncomfortable or unsuitable that day, and some lung conditions or a recent chest procedure need individual review first. Our safety guide sets out who should not use the chamber.
• Treat injuries as injuries. A painful, swollen joint or a knock that stops you training needs assessment by a physiotherapist or doctor, not a recovery tool. If you have taken a blow to the head, read our head injury guide first.
• Keep it proportionate. A single session is a sensible way to find out whether you tolerate the chamber before committing to more. The clinic's general intervals are explained in how often to have HBOT, and current options are on the pricing page.

No referral needed. Medical consultation included. If your answers on the medical declaration raise a question, the clinic will clarify it before your first session.