H E A T

Every civilisation, across every continent, across thousands of years of independent development, arrived at the same conclusion: controlled heat exposure is one of the most powerful tools available for human health and longevity.

The oldest recovery protocol in human history. Perfected.

For thousands of years, before performance labs and wearables and biometric tracking, human beings knew something important: that heat — applied deliberately, endured with intention — changed the body.
Finnish saunas. Roman thermae. Japanese onsen. Indigenous sweat lodges. Every civilisation, across every continent, across thousands of years of independent development, arrived at the same conclusion: controlled heat exposure is one of the most powerful tools available for human health and longevity.
They were right. The science now tells us exactly why.
The cardiovascular response to sauna heat is among the most dramatic physiological adaptations available to the human body without pharmacological intervention.
Within minutes of entering a sauna at 80–100°C, heart rate rises to between 100 and 150 beats per minute — the equivalent of moderate cardiovascular exercise. Blood plasma volume expands. Cardiac output increases. The heart is trained without the mechanical stress of running or cycling. Dr. Jari Laukkanen's landmark research through the University of Eastern Finland — one of the most comprehensive longitudinal studies ever conducted on sauna use — followed 2,315 men over 20 years and found that men who used a sauna four to seven times per week had a 63% lower risk of sudden cardiac death, a 48% lower risk of fatal coronary heart disease, and a 40% lower risk of all-cause mortality compared to those who used a sauna once per week.
These are not marginal improvements. These are generational shifts in health outcome.
The mechanism behind much of this is heat shock protein (HSP) activation. HSPs are molecular chaperones that repair damaged proteins, prevent cellular degradation, and support the structural integrity of muscle tissue. Sauna use is one of the most potent activators of HSP production known to science. This is why regular sauna users experience faster muscular recovery, reduced soreness, and — over time — greater resistance to the physical deterioration that accompanies ageing.
Growth hormone is another vector. A single intense sauna session can produce a 200–300% increase in growth hormone release. Combined with the deep sleep that regular heat exposure promotes — by dropping core temperature more rapidly after sessions, a physiological cue that accelerates sleep onset and deepens slow-wave sleep — the anabolic environment created by consistent sauna use is significant.
The detoxification argument is often overstated in wellness culture, but the sauna's role in supporting the excretory pathway via sweat is real. Heavy metals, BPA, phthalates, and other lipophilic toxins are measurably excreted through sweat. The skin is the body's largest organ. Using it as an eliminatory pathway — something most people in the modern world almost never do — is a meaningful contribution to overall toxic load reduction.
There is also the mental health dimension. Heat exposure activates dynorphin release, which paradoxically upregulates mu-opioid receptors, making you more sensitive to endorphins in the hours following a session. The relaxation is not incidental — it is biological, deep, and sustained.

The Helix Heat range is built around this understanding.

The Solstice collection for those entering the world of heat therapy — elegant, reliable, accessible. The Solheim collection for those who have made heat a cornerstone of their routine and want an environment that matches the seriousness of that commitment. The Eldur, a vertical barrel sauna that functions as both a performance tool and an architectural statement. Steam rooms for the specific respiratory and dermal benefits that humid heat provides.
Every model. Every material specification. Every heater configuration. Chosen because it creates the optimal environment for the physiological adaptations the research demonstrates are available.
Heat is the original biohack. HELIX has simply made it extraordinary.
The numbers
63% Lower risk of sudden cardiac death (4–7× weekly sauna use)
300% Increase in growth hormone from sauna exposure
20yr Duration of Laukkanen longitudinal sauna study
80–100°C Optimal sauna temperature for cardiovascular adaptation
Explore the full Helix Heat range — the Solstice collection, the Solheim range, the Eldur barrel sauna, and steam rooms below.

HELIX
Human Performance Technologies
Eight protocols. One integrated system. Built for people who refuse to leave performance on the table.

H E A T

Solstice Snug — Traditional Sauna

Solheim Cove — Traditional Sauna

Eldur — 2-Person Vertical Barrel Sauna

Activshape Pilates — Hot Pilates Capsule

Activ Couch V2 — Heated Recovery Couch

The oldest recovery protocol in human history. Perfected.

The Helix Heat range is built around this understanding.