Practical cold plunge guidance written for Australian conditions — how cold the water should be, how long to stay in, how often to plunge, and what a chiller actually adds to your power bill. Health claims link to the research behind them.
Ozone versus UV-C for keeping cold plunge water clean. UV plus mechanical filtration is simpler for most home tubs; neither leaves a residual sanitiser, so shared tubs still need chlorine or bromine.
Is alternating hot and cold better than cold alone? Contrast therapy compared against a straight cold plunge on evidence, effort and cost.
What a cold plunge tub costs in Australia, from a DIY inflatable to a commercial setup, plus the running costs that decide whether ice or a chiller works out cheaper over five years.
Whether cold water actually does anything for skin, face and hair, separating the measurable effects from the routine that went viral on social media.
Cold water immersion does reduce inflammation, but in a specific way over a specific timeframe. What the research supports, what it doesn’t, and why the distinction changes how you should use it.
Whether cold plunges raise testosterone. Three controlled studies measured it directly and all found a drop or a blunted post-exercise rise — the opposite of the popular claim.
When to sauna and when to cold plunge, depending on whether you’re chasing focus, endurance recovery, strength adaptation or sleep. Includes the timing windows and temperatures the research supports.
Cold plunges raise blood pressure in the short term rather than lowering it, and the best available meta-analysis found no consistent long-term reduction. What that means if you have hypertension.
How to keep cold plunge water clean: filtration, UV or ozone, and the small amount of chemical sanitiser that keeps a home tub safe between changes.
How often to cold plunge. Two to four sessions a week around 10-15°C, totalling roughly 11 minutes of cold exposure, is the range the research supports.
