Exploring the Impact of Infrared Apparel on VO2

Athletic Cyclist

Infrared apparel, for example clothing that is powered by CELLIANT, is apparel made from responsive infrared textiles. These fabrics work by capturing and converting body heat into infrared energy, which it re-emits back into the body’s tissue and muscle, penetrating up to four cm. This increases local circulation and improves cellular oxygenation, supporting better endurance, strength and post-workout recovery.

Athletes and fitness enthusiasts who want to improve their speed and endurance often look for ways to “hack” their biology to unlock their full potential. Biohackers tweak their diets, exercise routines, and lifestyles to find the right combination of changes to improve their athletic performance. Infrared apparel is one of the newest ways to biohack fitness levels, and it’s as simple as getting dressed.

CELLIANT and our Science Advisory Board commissioned a study to further explore the impact of infrared clothing on physical performance, specifically on the volume of oxygen consumed (VO2) during exercise. VO2 is a metric that describes the amount of oxygen the body can use during exercise, and it’s an important measure of cardiovascular fitness. Lowering VO2 increases the anaerobic threshold, which allows the body to sustain exercise for a prolonged period. 
The results revealed that infrared clothing has positive impacts on VO2. These findings position infrared fabric on the cutting edge of the athletic apparel industry, creating unique, high-value products that offer consumers science-backed fitness and wellness benefits.

Can Infrared Apparel Improve an Athlete's VO2?

Several studies have shown that far infrared has physiological effects when used to treat certain medical conditions such as arthritis, menstrual pain, and chronic foot pain. If athletic apparel made with far infrared technology can show positive physiological effects, it can potentially improve the volume of oxygen consumption, and therefore overall athletic performance, when worn during exercise.

Our study examined whether far infrared apparel affects oxygen consumption during exercise at intensities below an athlete’s anaerobic threshold. In other words, the test subjects exercised at a sustainable pace rather than at their maximum performance level. At this intensity, the body uses aerobic respiration to convert oxygen into energy, making VO2 an essential metric to monitor.

The study monitored oxygen consumption from aerobically fit cyclists during exercise tests while wearing infrared apparel and non-infrared control apparel. At lower cycling intensities, the subjects consumed 1.1% less oxygen when wearing the infrared apparel compared to the control garment, despite exercising at the same intensity.

Additional research is required to determine the implication of this effect for a training or competing athlete; however, the results indicate that this apparel technology does elicit a physiological effect and has the potential to positively affect strength, endurance, and overall athletic performance.


There are three types of infrared wavelengths: near, mid, and far. Each wavelength penetrates the body at different depths and offers its own unique benefits. CELLIANT incorporates the benefits of all three infrared wavelengths to create clothing that provides robust support to athletes.

Infrared light has multiple wavelengths, near infrared, mid infrared, and far infrared

What is the Relationship Between Infrared Light and VO2?

Many studies have shown that infrared light has positive physiological effects on the body. In one study, participants saw a significant increase in the amount of oxygen available in the blood near the skin’s surface when wearing infrared clothing compared to traditional apparel.

In a similar study, researchers found that infrared clothing increased test subjects’ blood flow and improved muscular performance, which they measured via hand grip strength. Infrared apparel has also been shown to reduce the body measurements of women who wore infrared garments. Researchers attribute the reduction to increased microcirculation and peripheral blood flow, and they indicate that these changes could promote better general health.

By increasing local circulation and oxygen saturation in the blood, infrared technology has the potential to boost the oxygen uptake efficiency of the muscles and improve VO2, leading to an improvement in an athlete’s overall strength, stamina, and recovery time.


Infrared apparel is made by either printing or permanently embedding infrared-emitting particles into the fabric. These particles absorb body heat and convert it into infrared energy. This energy is then re-emitted back into the body, penetrating deep into the skin and soft tissues.


The process of capturing the body’s heat and recycling it into infrared energy increases local circulation and improves cellular oxygenation. These changes can have positive physiological effects such as increased endurance, speed, and strength; faster recovery time; and improved sleep.

Runner stretching on track during run


Infrared clothing is considered safe and does not have any known side effects.


During our study, each subject participated in four randomized cycling tests. They were tested twice while wearing a full-body infrared garment and twice while wearing a similar control garment made from traditional materials.

We measured changes in participants’ VO2 in two ways. A breathing mask attached to a metabolic analysis cart monitored the volume of oxygen uptake, and blood tests taken at different stages of exercise monitored the amount of lactate buildup in the blood. Lactate increases with exercise intensity, so the blood tests established the intensity at which the participants were cycling and ensured they were below the anaerobic threshold.
Combined, the oxygen uptake and blood lactate measurements indicate participants’ oxygen consumption at various submaximal intensities, which is when the body uses aerobic respiration to produce energy from oxygen consumption. The results showed an average VO2 improvement of 1.1%.


Aerobic and anaerobic respiration refers to the two methods the body uses to supply the energy it needs during physical activity. Aerobic respiration uses oxygen to create energy. When the body lacks sufficient oxygen, it switches to anaerobic respiration, where it uses glucose reserves to produce energy quickly.

The body uses aerobic respiration during moderately intense exercise that’s maintained over a prolonged period, such as long-distance running. It uses anaerobic respiration during high-intensity, short-duration activities such as sprinting.

When the body switches from aerobic to anaerobic respiration, it crosses the anaerobic threshold. In this state, an athlete is working at a high intensity and their muscles will begin to fatigue because lactate builds up in the blood, which is not sustainable.


The anaerobic threshold is the point during exercise where the body no longer has sufficient oxygen to meet its energy demands through aerobic respiration and must rely on anaerobic metabolism.

When the body crosses the anaerobic threshold, it causes lactate to accumulate in the blood and muscles. As lactate builds up and the body’s glucose levels are depleted, the muscles begin to fatigue and athletic performance diminishes.

The anaerobic threshold is an important metric for athletes in both endurance and high-intensity sports. The higher a person’s anaerobic threshold, the longer they can perform at a high intensity before experiencing muscle fatigue.

Our study shows that infrared apparel may be able to increase an athlete’s anaerobic threshold by improving VO2, allowing them to maintain a high level of performance over a longer period.
Indoor cyclist doing cardio workout


Anaerobic respiration occurs when the body doesn’t have sufficient amounts of oxygen available to meet its energy demands. Instead of oxygen, it uses a process called glycolysis to convert glucose reserves into energy to fuel the muscles. Blood lactate, sometimes called lactic acid, is a byproduct of this process.

During moderate exercise, the body may generate lower levels of lactate, but it’s able to clear it effectively to keep the muscles functioning properly. However, at high intensities, blood lactate builds up faster than the body can recycle it, and this, in addition to other factors, causes the muscles to fatigue.

Infrared Clothing Shows Significant Potential During Training

Infrared light in the form of saunas, heat lamps and other devices has a well-documented history of providing positive physiological effects on the body, from increased local circulation to increased cellular oxygenation. Our study indicates that infrared light is also effective in the form of clothing and/or textiles. Infrared emitted from apparel does not require any external power source as is the case for saunas and heat lamps, which are used for a limited time, usually only several minutes. Infrared apparel can easily be worn for several hours.

Our results show that while exercising below their anaerobic threshold, meaning at a level that can be sustained for a prolonged period of time, the subjects showed a statistically significant improvement in VO2 when wearing the far infrared garments.

Athletes who wear infrared apparel during training exercises, or any activity that occurs below the anaerobic threshold, could potentially see a variety of benefits from improved oxygen uptake, including more speed, better endurance, and faster recovery times.


Do these findings imply that CELLIANT is well-suited for training apparel?

Our study indicates that far infrared clothing provides beneficial physiological effects when worn during training and other physical activities that are performed below the anaerobic threshold. The CELLIANT fabric tested in our study emits far infrared wavelength providing deep tissue penetration.

Do these findings imply that CELLIANT-infused products benefit daily exercise routines?
Our results show that far infrared shows the most significant VO2 benefits during low- to moderate-intensity exercises done below the anaerobic threshold. This makes CELLIANT products an excellent choice for daily exercise routines for both high-level athletes and fitness enthusiasts. CELLIANT has been demonstrated to improve strength, stamina, speed, endurance, and post-workout recovery times.
Athlete preparing for run in exercise apparel


CELLIANT-powered products have wide appeal. From longevity-seeking seniors and wellness-conscious millennials to biohackers and elite athletes, everyone wants an easy way to improve their physical health and quality of life. Infrared apparel may provide a solution that doesn’t require a time or energy investment in order to see clinically proven results.

Introduce CELLIANT to your product lines to:


If you are interested in further understanding the science behind CELLIANT, please click here to download our ten peer-reviewed, published studies, including our work on volume of oxygen consumption.

You can also fill out the form below to connect with a CELLIANT representative to learn more about how the science behind infrared light can help take your brands’ products to the next level.



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