These three therapies are some of the most requested topics I get questions about — and for good reason. Hyperbaric oxygen, cold therapy, and red light therapy all influence cellular stress, recovery, inflammation, and nervous system regulation, but they work through very different biological pathways.

Below is a science-backed breakdown of what each therapy is, how it works, what it’s best for, and how to pair them together depending on your goals.

Hyperbaric oxygen therapy involves breathing near-100% oxygen (via a mask) inside a pressurized chamber. The increased atmospheric pressure allows significantly more oxygen to dissolve directly into the blood plasma — beyond what red blood cells alone can carry.

Under pressure, oxygen becomes more soluble in plasma, which allows it to reach tissues with impaired circulation, inflammation, or injury. This increased oxygen availability supports:

This is why HBOT has long been used in hospital settings for specific medical indications.

This increased diffusion gradient allows oxygen to penetrate deeper into tissues, supporting:

In simple terms: pressure allows oxygen to go where it normally can’t.

There is also emerging but mixed evidence for neurological applications (e.g., traumatic brain injury, cognitive recovery). Outcomes appear highly dependent on protocol, pressure, duration, and patient selection, so this is not a one-size-fits-all therapy.

True medical-grade HBOT typically operates around 2.0–2.5 ATA (atmospheres absolute) for 60–90 minutes. At sea level, we live at 1.0 ATA. During HBOT, pressure is typically increased to 2.0–2.5 ATA in medical settings, meaning the body is exposed to two to two-and-a-half times normal atmospheric pressure.

Cold therapy exposes the body to cold temperatures via water (cold plunge, ice baths) or air (cryotherapy), creating a powerful physiological stress response.

Cold exposure activates:

Cold also stimulates norepinephrine release, which influences mood, alertness, and energy levels.

Cold therapy is best supported for:

Evidence for long-term metabolic, immune, or mental health benefits is promising but still evolving and varies widely by protocol and individual tolerance.

Using cold therapy immediately after resistance training may blunt some muscle-building signals. If hypertrophy is your main goal, cold is better placed:

Cold exposure acutely raises heart rate and blood pressure. Individuals with cardiovascular disease, arrhythmias, uncontrolled hypertension, or anxiety sensitivity should approach cold carefully and progressively.

Red light therapy uses red and near-infrared wavelengths of light to influence cellular signaling, particularly at the level of the mitochondria.

Photobiomodulation penetrates deep tissues and interacts with mitochondrial enzymes involved in energy production, supporting:

Unlike heat-based therapies, red light works through non-thermal photochemical effects.

Red light therapy has supportive evidence for:

Outcomes depend heavily on wavelength, dose, distance, and consistency — more is not always better.

Red light therapy is generally well-tolerated, but eye protection is important. Pregnancy and active malignancy warrant extra caution and clinician guidance.

Red light → Cold (short exposure)

This pairing works well for nervous system balance when done conservatively.

Cold → Red light

If muscle gain is the goal, separate cold from lifting or use it sparingly.

Red light consistently + cold strategically

Consistency tends to matter more than intensity here.

HBOT + Red light

Cold should be used cautiously and only if approved post-op.

Conservative stacking

This is an area of active research, not blanket recommendations.

When shopping for a home red light device, I look for:

Amazon Links:

These therapies are not magic — but when used intentionally, safely, and in the right context, they can meaningfully support recovery, performance, and overall health. The key is matching the tool to the goal, not stacking everything all the time.

This information is intended for education and empowerment and should not replace individualized medical guidance from your healthcare provider. For any recommendations or questions, please reach out ❤️ Liz <3