THERMIVA RESEARCH LIBRARY
A curated reading list covering sauna bathing, infrared heat and cold-water immersion. Each summary separates the observed finding from the study design and its limits.
A systematic review found possible cardiovascular, respiratory and quality-of-life benefits across 40 clinical studies, while noting that many studies were small and better trials are needed.
Hussain & Cohen, 2018 · Evidence-Based Complementary and Alternative Medicine
In a small crossover trial, a 20-minute infrared-sauna session was linked with lower perceived muscle soreness and a smaller drop in jump performance. The sample was limited to 16 male basketball players.
Ahokas et al., 2023 · Biology of Sport
A 2025 systematic review and meta-analysis found some time-dependent effects on stress, sleep and quality of life in healthy adults, but emphasised small samples and limited long-term evidence.
Cain et al., 2025 · PLOS ONE
In a cohort of Finnish men, more frequent sauna bathing was associated with lower rates of fatal cardiovascular events and all-cause mortality over a median 20.7 years. This observational study cannot establish cause and was not specific to infrared sauna.
Laukkanen et al., 2015 · JAMA Internal Medicine
A meta-analysis of nine studies found that cold-water immersion can affect delayed-onset muscle soreness, with results depending on temperature and exposure time. Protocols commonly clustered around 11–15°C for 11–15 minutes.
Machado et al., 2016 · Sports Medicine
This physiology review explains why cold water may be used as an intervention while also presenting a real hazard. Individual response, acclimatisation, water temperature and exposure duration all matter.
Tipton et al., 2017 · Experimental Physiology
For education only. The studies below investigate specific populations, protocols and outcomes; they do not prove that a Thermiva product diagnoses, treats, cures or prevents disease. Sauna and cold-water exposure may not be suitable for everyone. Speak with a qualified health professional before use if you have a medical condition, take medication, are pregnant, or are unsure about your individual risk.
