Research
What published studies actually found about the tools on our shelves, with links to every paper.
Behavioral Sleep Medicine · 2017
In 41 healthy adolescents and young adults, the ring agreed well with lab polysomnography on total sleep time and wake after sleep onset, but was less accurate at telling individual sleep stages apart. Useful for trends, not a diagnosis.
Study: The Sleep of the Ring: Comparison of the ŌURA Sleep Tracker Against Polysomnography
Read the study ↗Science & Sports · 2026
Pooling randomised trials in healthy people and athletes, red and near-infrared light was associated with less soreness and faster strength recovery in the days after hard exercise. Protocols varied widely.
Study: Can photobiomodulation therapy attenuate delayed-onset muscle soreness and strength loss after exercise? A meta-analysis of RCTs
Read the study ↗Journal of Strength & Conditioning Research · 2026
A randomised crossover trial comparing two cold-water immersion protocols found both helped short-term recovery markers, with timing and temperature mattering more than doing it for longer.
Study: Efficacy of a meta-analysis–recommended immersion protocol vs. a field-practical cold-water protocol for performance recovery
Read the study ↗Journal of Sport and Health Research · 2026
Cold water helped soreness and short-term recovery, but regular use straight after strength training may blunt long-term muscle gains. Use it selectively.
Study: Effects of cold water immersion on athletic performance and physiological adaptations: a systematic review and meta-analysis
Read the study ↗JAMA Internal Medicine · 2015
In 2,315 Finnish men followed for about 20 years, more frequent sauna use was associated with lower cardiovascular and all-cause mortality. Observational, so it shows association rather than cause.
Study: Association between sauna bathing and fatal cardiovascular and all-cause mortality events
Read the study ↗Journal of the International Society of Sports Nutrition · 2017
The society concluded creatine monohydrate is the most effective ergogenic supplement for high-intensity training and is well tolerated in healthy people at recommended doses.
Study: ISSN position stand: safety and efficacy of creatine supplementation in exercise, sport and medicine
Read the study ↗Not medical advice. We explain published research in plain English for general interest only. Studies have limits and results vary. Talk to your GP or a qualified health professional before changing your routine, especially if you are pregnant, take medication or have a health condition.
Install Vital LabAdd it to your home screen for instant, offline access.