Introduction to Contrast Therapy
In today’s fast-paced world, social media is awash with content promoting contrast therapy as an indispensable tool for biohacking and wellness improvement. From invigorating cold plunges to soothing infrared saunas and traditional saunas, enthusiasts advocate for the benefits of extreme hot and cold exposure, touting it as a pathway to faster recovery, enhanced energy levels, and improved long-term health. However, popularity does not equate to universal safety or efficacy.
“Contrast therapy creates real physical stress on the body,” noted Mike Elliott, Senior Director at Banner Sports Medicine High Performance Center. “That stress can lead to beneficial adaptations but also carries risks, especially for those who are not suitable candidates or who misuse these therapies.”
If you’re contemplating the incorporation of contrast therapy into your wellness routine, continue reading to delve into the nuances of saunas (both traditional and infrared) and cold plunging.
Why Are Extreme Temperatures So Popular?
The use of hot and cold therapies is not a novel concept. For decades, athletes have relied on ice baths to aid recovery, while saunas have been an integral part of cultural practices worldwide for centuries.
The contemporary trend is the frequent use of these methods for general wellness. Engaging with extreme temperatures elicits potent physical reactions, which is part of their allure. By pushing the body beyond its comfort zone, these practices compel it to exert effort to maintain balance, or homeostasis.
“Exposure to hot and cold environments stimulates responses in heart rate, blood flow, hormonal levels, and the nervous system,” Elliott explained. “Over time, the body can adapt, potentially reaping benefits.”
However, the keyword here is “potentially.”
Traditional Saunas
How They Work
Traditional saunas operate by heating the surrounding air through heated rocks, an electric heater, or a wood stove. Initially, this hot air warms your skin, followed by an increase in core temperature. This results in an elevated heart rate, dilated blood vessels, and profuse sweating.
“The body’s reaction to a traditional sauna mirrors aerobic exercise,” Elliott stated. “Heart rate increases, circulation improves, and the body strives to cool itself due to a rise in core temperature.”
Benefits Supported by Research
- Heart Health and Longevity: Regular sauna usage is linked to a reduced risk of heart disease and overall mortality. Research indicates a dose-response relationship, wherein more frequent and prolonged sessions correlate with greater benefits.
- Brain Health: Longitudinal studies indicate that habitual sauna users may experience a lower risk of dementia and Alzheimer’s disease.
- Lung and Immune Support: Some evidence suggests a correlation between regular sauna use and a decreased risk of asthma, COPD, and pneumonia.
- Pain Relief and Recovery: Heat application can alleviate symptoms of osteoarthritis, rheumatoid arthritis, fibromyalgia, and other chronic pain conditions.
- Hormonal and Mood Effects: Traditional sauna sessions can elevate growth hormone levels, aiding muscle repair and fat metabolism, while endorphin release may enhance mood.
Drawbacks to Consider
Not everyone can comfortably endure high temperatures. “Individuals with heat sensitivity or unstable heart conditions may find traditional saunas intolerable,” Elliott cautioned. “Furthermore, most studies are observational, indicating associations rather than causation.”
How Research Supports Using Traditional Saunas
- Temperature: 175-210 degrees Fahrenheit
- Session Length: Five to 20 minutes
- Frequency: Daily, several times a week, or even once per week shows benefits
Infrared Saunas
How They Work
Infrared saunas utilize infrared panels to directly heat the body, bypassing the need to heat the air. This method raises core temperature and induces sweating at lower ambient temperatures.
“Infrared saunas, with their lower heat settings, can be more inviting,” Elliott remarked. “They serve as a gentler introduction for some individuals.”
Potential Benefits
- Heart and Metabolic Health: Studies indicate potential reductions in blood pressure and improvements in blood vessel function.
- Pain Relief: Some reports highlight decreased pain in individuals with rheumatoid arthritis and other chronic pain conditions.
- Stress and Mood: The use of infrared saunas may release endorphins, promoting relaxation and mood enhancement.
Limitations
Many infrared sauna studies feature limited participants, shorter durations, or manufacturer involvement, potentially skewing results.
“To fully comprehend the benefits, we require larger, long-term studies,” Elliott emphasized.
How Research Suggests Using Infrared Saunas
- Temperature: 115–140°F
- Session Length: 15–30 minutes
- Frequency: Daily or several times a week
Cold Plunges
How They Work
Cold plunging generally involves immersion in water below 60°F, typically between 50 and 56°F.
“Cold exposure triggers an immediate stress response,” Elliott explained. “Heart rate increases, breathing quickens, blood vessels constrict, and stress hormones are released.”
Shivering may ensue as the body generates heat. Additionally, cold exposure slows nerve signals, potentially diminishing pain but also affecting coordination and muscle function.
Potential Benefits
- Muscle Soreness and Recovery: Cold plunges can alleviate post-exercise muscle soreness by reducing inflammation.
- Circulation Response: Following cold exposure, blood flow increases as the body warms.
- Metabolic Effects: Cold exposure elevates energy expenditure and may enhance insulin sensitivity through brown fat activation.
- Stress and Alertness: Research suggests potential reductions in stress and enhancements in alertness.
How Research Suggests Using Cold Plunges
- Water Temperature: 50–56°F
- Session Length: Five to 20 minutes
- Frequency: Two to four times per week
Who Should Avoid These Therapies?
While contrast therapies offer numerous benefits, they are not without risks.
Avoid Cold Plunges If You Have:
- Heart disease
- Cold allergy (cold urticaria)
- Open wounds or infections
- Raynaud’s or peripheral vascular disease
- Weakened immune system
Avoid Saunas (Traditional and Infrared) If You Have:
- Heart disease
- Kidney disease
- Active infection, fever, or bleeding
- Are pregnant
Higher Risk Groups
- Older adults
- People on blood pressure medicines, blood thinners, stimulants
- Those with asthma or COPD
- Pregnant women
- Children
- People with diabetes-related nerve damage
Stop Immediately If You Feel:
- Chest pain
- Dizziness
- Confusion
- Shortness of breath
- Weakness
- Nausea
- Irregular heartbeat
- Trouble breathing
Tips for Safely Getting Started
- Consult with a Health Care Provider: Discuss your existing health conditions and medications.
- Start Slow and Build Tolerance: Begin with milder cold plunges or lower-temperature infrared saunas.
- Always Have a Companion: It’s crucial to have someone nearby in case of emergencies.
- Set a Timer: Adhere to the recommended timeframes.
- Stay Hydrated: Ensure hydration before, during, and after sessions to prevent dehydration and electrolyte imbalance.
- Align Therapy with Goals: Tailor your use of these tools to align with your specific wellness objectives.
Conclusion
While cold plunges, infrared saunas, and traditional saunas can yield significant benefits, they are not miraculous solutions. The stress induced by extreme temperatures can be advantageous if used judiciously, but it can also be detrimental if used recklessly. Always prioritize safety, listen to your body’s signals, and proceed with caution. For any questions or concerns, consult with your healthcare provider or a Banner Health specialist to ensure these therapies align with your health goals.
