Video·3 min read·May 2026

Embracing the Chill: How Cold Exposure Can Enhance Your Heart Health

Cold Therapy • 3 min read • Based on research by Sarah L. Ullevig, Masataka Umeda, Eunhee Chung, Ana L. Sesatty, Karina E. Samsuhadi, Donovan L. Fogt (2019)

Have you ever stepped out into the cold and felt an invigorating rush? That sharp intake of breath, the tingling skin, and the sudden clarity of thought might be more than just a fleeting moment of discomfort. Recent research suggests that this acute cold exposure (ACE) could have significant benefits for your cardiovascular health.

In a world where wellness trends come and go, cold exposure stands out as a ritual with roots in ancient practices. By understanding its effects on our bodies, we can integrate this powerful therapy into our lives, promoting resilience and longevity.

The Science Behind Cold Exposure

Acute cold exposure refers to short bursts of cold temperatures, typically between 4°C to 15°C, lasting around 30 minutes. This protocol triggers various physiological responses in our bodies. One of the key findings from research is that ACE increases energy expenditure by 52% and boosts heart rate by 11%. This means that your body works harder, burning more calories and promoting a more active metabolism.

The study also observed alterations in inflammatory and lipid biomarkers, which are crucial indicators of cardiovascular health. Specifically, interleukin-1 beta (IL-1β), a cytokine involved in inflammation, increased significantly after just 30 minutes of exposure. This suggests that cold exposure may stimulate your immune system in a way that could be beneficial for heart health.

The Impact on Cardiovascular Health

So, what does all this mean for you? The changes in inflammatory markers and lipid profiles indicate that ACE could potentially lower the risk of cardiovascular diseases. After cold exposure, there was a notable 15% increase in high-density lipoprotein (HDL), often referred to as 'good cholesterol.' Higher levels of HDL are linked to a reduced risk of heart disease, making this a compelling reason to consider incorporating cold exposure into your routine.

Furthermore, the ability to modify inflammation is crucial. Chronic inflammation is a well-known risk factor for various diseases, including heart disease. By engaging in cold exposure, you may be actively participating in a protocol that helps your body manage inflammation more effectively.

Incorporating Cold Exposure into Your Wellness Ritual

Integrating cold exposure into your wellness routine can be simple and accessible. You might start with a cold shower, gradually reducing the temperature as your body acclimates. Alternatively, consider visiting a cryotherapy center or a sauna that offers cold plunge options. The key is to approach this practice mindfully, allowing your body to adapt while enjoying the clarity and resilience that follows.

As you engage with this ritual, pay attention to how your body responds. Notice the increased energy, the enhanced mood, and the sense of clarity that accompanies the chill. This intentional practice can serve as a sanctuary for your mental and physical well-being, guiding you toward a more balanced state of health.

Key Takeaways

Acute cold exposure can increase energy expenditure and enhance cardiovascular health by modifying inflammation and lipid profiles.
Incorporating cold exposure into your wellness routine may promote resilience and longevity, offering a simple yet powerful addition to your health protocols.

Based on: Effects of acute cold exposure on plasma inflammatory and lipid biomarkers related to cardiovascular disease risk
Sarah L. Ullevig, Masataka Umeda, Eunhee Chung, Ana L. Sesatty, Karina E. Samsuhadi, Donovan L. Fogt (2019). Journal of Integrative Cardiology Open Access

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Effects of acute cold exposure on plasma inflammatory and lipid

What This Research Is Actually Claiming

Twenty healthy adults. Thirty minutes. Seven degrees Celsius water on their legs and torso. That's the protocol. And what Ullevig and her team at UT San Antonio found is worth sitting with: a 52% increase in energy expenditure, an 11% jump in heart rate, and — most intriguingly — a 15% rise in HDL cholesterol two hours after cold exposure ended. Not during. After.

The core claim here is that acute cold exposure doesn't just make you burn more energy in the moment. It triggers a cascade of biomarker changes — inflammatory cytokines, acute phase proteins, lipid profiles — that are directly relevant to cardiovascular disease risk. This isn't a study about how cold feels. It's a study about what cold does to your blood chemistry.

The Paradox at the Center

Here's where it gets interesting. IL-1β — interleukin-1 beta, a pro-inflammatory cytokine — increased by 24% during the cold session and by 65% two hours afterward. That looks alarming on the surface. You're deliberately inflaming yourself?

But this is the hormesis story again. Short-term inflammation isn't the enemy — chronic, low-grade inflammation is. IL-1β rising acutely in response to a controlled stressor is your immune system signaling, adapting, preparing. It's the same mechanism we see with exercise. A hard run spikes inflammatory markers. That doesn't mean running is bad for you. The question is always: does the acute stress produce adaptive benefit over time?

The HDL answer — a 15% increase at the two-hour mark — suggests yes. HDL is the clearance system for cardiovascular risk. More of it means better lipid transport, less plaque-forming debris circulating in your blood. The inflammatory surge appears to be part of the same adaptive cascade that produces that benefit.

The inflammatory surge and the HDL rise aren't contradictions. They're the same adaptive response, viewed from two different windows. Cold stresses the system. The system responds by cleaning house.

Where the Research Gets Complicated

The study authors acknowledge the tension directly: colder climates are associated with higher rates of cardiovascular disease. So cold is bad? Not quite. The distinction is between chronic, uncontrolled environmental cold — poor housing, inadequate clothing, prolonged physiological stress with no recovery — and deliberate, bounded, controlled cold exposure with full recovery afterward.

The sex differences the researchers noted are also worth flagging. IL-2, IL-6, IL-8, ferritin, alpha-2-macroglobulin, and HDL all showed different responses between male and female participants. This is a thread that most cold exposure research ignores. If your hormonal profile shapes your inflammatory response to cold, then a single universal protocol may not be optimal for everyone. The research is still early on this.

What to Actually Do With This

The protocol here — legs and torso in seven-degree water for 30 minutes — is more aggressive than most people need to start. A cold shower that hits ten to fifteen degrees Celsius for five minutes will engage many of the same mechanisms. The key signals to the body are the same: vasoconstriction, sympathetic activation, thermogenic response. You don't need to recreate a lab protocol at home.

What this research confirms is that the two-hour post-exposure window matters. The HDL rise wasn't during cold — it was after. So the recovery period isn't passive. It's when the adaptation happens. Don't immediately follow a cold plunge with a workout. Let your body complete the cascade.

The Connection Most People Miss

Alpha-2-macroglobulin increased 16% during cold exposure, then returned to baseline two hours later. This acute phase protein is a broad-spectrum protease inhibitor — it traps and neutralizes enzymes that can damage tissue. Its temporary rise during cold exposure looks like a protective response, the body rapidly deploying molecular armor against potential cellular stress.

We see heat shock proteins do something similar in sauna research — molecular chaperones clearing misfolded proteins during heat stress. Cold appears to have its own version of this protective protein deployment. Different mechanism, same principle: thermal stress activates the body's molecular housekeeping systems. The ritual of deliberate discomfort turns out to be the body's preferred signal to clean up and adapt.

Effects of acute cold exposure on plasma inflammatory and lipid

Embracing the Chill: How Cold Exposure Can Enhance Your Heart Health

The Science Behind Cold Exposure

The Impact on Cardiovascular Health

Incorporating Cold Exposure into Your Wellness Ritual

Key Takeaways

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