Video·3 min read·May 2026

Unlocking the Science of Cold: Insights into Pain Relief and Recovery

Cold Therapy • 3 min read • Based on research by R. L. Holland, N. E. Harkin, S. R. K. Coleshaw, D. A. Jones, A. W. Peck, A. Telekes (1987)

Imagine stepping into a cold plunge after a workout, feeling the brisk water envelop your skin. The initial shock quickly melts away, replaced by a sense of clarity and resilience. For many, this ritual is more than just a moment of discomfort; it’s a pathway to recovery and well-being. But what if the science behind cold exposure could reveal even deeper insights into how we manage pain and enhance our recovery?

Recent research sheds light on the mechanisms of pain relief during cold immersion, challenging some common assumptions. A study conducted by Holland et al. (1987) explores how specific substances interact with our body’s response to cold pain, providing a clearer understanding of how we can harness these principles for improved wellness.

Understanding Cold-Induced Pain

Cold immersion can induce significant discomfort, often described as sharp or intense pain. This study focused on understanding how certain medications, particularly dipipanone and nifedipine, affect this pain response.

In a controlled environment, twelve healthy volunteers underwent a cold pain test, immersing their hands in ice-cold water. The researchers measured their pain levels while monitoring skin temperature. Surprisingly, the results revealed that dipipanone provided significant pain relief without raising skin temperature. This means that the analgesic effect was not due to warming the skin, a common assumption in pain management.

What Does This Mean for Contrast Therapy?

The findings of this study offer valuable insights into the practice of contrast therapy, which often alternates between hot and cold exposure. It suggests that the benefits of cold immersion may be more complex than simply warming up the body. Instead, the pain relief experienced could stem from biochemical responses triggered by the cold itself.

For example, dipipanone’s effectiveness in alleviating cold-induced pain without the need for vasodilation (the widening of blood vessels) indicates that other mechanisms are at play. This insight opens up possibilities for further research into how we can manipulate these responses for enhanced recovery and longevity.

Practical Implications for Your Wellness Routine

Understanding the mechanisms behind pain relief during cold exposure can empower us to integrate these practices into our wellness rituals more effectively. If cold immersion can relieve pain without the need for warming, it invites us to embrace the discomfort of cold plunges with greater confidence.

Moreover, the study highlights the importance of exploring various methods of pain relief in our recovery protocols. As you consider incorporating contrast therapy into your routine, remember that the benefits may extend beyond mere temperature changes. Embrace the stillness of the cold, and allow your body to respond and adapt, fostering resilience and clarity in your wellness journey.

Key Takeaways

Pain relief from cold immersion may not rely on warming effects, challenging conventional beliefs about recovery.
Incorporating cold exposure into your wellness routine can enhance resilience and support recovery without the need for additional warming methods.

Based on: Dipipanone and nifedipine in cold induced pain; analgesia not due to skin warming
R. L. Holland, N. E. Harkin, S. R. K. Coleshaw, D. A. Jones, A. W. Peck, A. Telekes (1987). British Journal of Clinical Pharmacology

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Dipipanone and nifedipine in cold induced pain analgesia not due to skin

The Pain Isn't in Your Skin

This is a short paper from 1987, and on the surface it reads like a dry pharmacology study. Twelve volunteers, a bucket of ice water, two drugs, some thermocouples taped to their hands. But buried inside this tightly controlled experiment is something that fundamentally reshapes how we should think about cold-induced pain — and by extension, how we understand what cold immersion is actually doing to the body.

The core question Holland and colleagues were asking: when opioids relieve cold pain, is it because they're genuinely acting on pain pathways in the central nervous system, or is it just because they dilate blood vessels and warm the skin slightly? Because if it's the latter, then a lot of what we assume about opiate analgesia in cold models falls apart. And a lot of what we assume about cold pain itself needs revisiting.

Their answer is unambiguous. Dipipanone, an opioid, produced significant pain relief. It did not raise skin temperature by a single measurable degree. The pain relief was real. The skin warming was not. That means the analgesia is central — it's happening upstream, in the nervous system, not at the skin surface.

What the Vasodilator Tells Us

The nifedipine arm of this study is where it gets genuinely surprising. Nifedipine is a calcium channel blocker — a real vasodilator, the kind used clinically for Raynaud's disease, where cold-induced vasoconstriction causes serious vascular problems. And it worked as expected on the cardiovascular system: blood pressure dropped, heart rate climbed. Classic vasodilation response.

But when these subjects put their hands in ice water, the nifedipine did nothing to skin temperature. Nothing. The cold-induced vasoconstrictor response in the hand was so powerful, so automatic, so deeply wired into vascular physiology, that even a drug producing measurable systemic vasodilation couldn't overcome it.

The cold wins. Every time. Your hand's blood vessels will constrict in ice water whether you've taken a vasodilator or not. The body's response to cold is not negotiable at the periphery.

This finding has real implications for contrast therapy. The idea that alternating hot and cold exposure works primarily through vasodilation and vasoconstriction — the "vascular gymnastics" explanation — is true at a systems level. But this study is a reminder that the local vascular response during cold immersion is essentially locked in. The vasoconstriction is the reflex, and the body enforces it.

Where the Science Lands

The broader cold exposure literature is fairly consistent on this point. Lewis's 1930 work, which Holland cites, showed that vasoconstriction patterns in the hand during cold immersion are predictable and powerful. The Posner et al. 1985 paper confirmed that opioids reduce cold pain — this study simply clarifies the mechanism isn't peripheral warming. More recent work on cold pain thresholds supports the central pathway interpretation: the nervous system's interpretation of cold as painful is modulated at the level of the brain and spinal cord, not the skin.

Where there's still genuine uncertainty is around whether other, more potent vasodilators could overcome the cold-induced vasoconstriction. Holland and colleagues are careful to acknowledge this. Nifedipine at these doses didn't do it. Whether a different compound or combination could is an open question. But for practical purposes — for anyone thinking about contrast therapy and cold plunges — the message is clear: your peripheral circulation during cold immersion is not where the interesting pain modulation is happening.

What This Means for Your Protocol

Respect the cold for what it is: a powerful, systemic neurological event, not a skin temperature experiment. The discomfort you feel in a cold plunge is your central nervous system processing threat signals — not simply your skin reading a temperature gradient. That's why breath work, mental state, and accumulated experience with cold matter so much. You're not training your skin. You're training your brain's interpretation of a stimulus it's hardwired to flag as dangerous.

When you emerge from the cold and your body begins to rewarm, the vasodilation that follows is real and profound — and that's where the contrast therapy benefits come in. But during the immersion itself, your vascular response is the body's baseline. The adaption happens in the recovery, not the exposure.

A 1987 paper with twelve volunteers won't change your cold plunge routine. But understanding that the pain of cold is centrally processed — that it's your nervous system's interpretation, not just your skin's — might change how you relate to that discomfort when you're sitting in the ice. You're not just managing temperature. You're negotiating with your brain.

Dipipanone and nifedipine in cold induced pain analgesia not due to skin

Unlocking the Science of Cold: Insights into Pain Relief and Recovery

Understanding Cold-Induced Pain

What Does This Mean for Contrast Therapy?

Practical Implications for Your Wellness Routine

Key Takeaways

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