Women's Recovery Is Being Redefined
For a woman weighing a cold plunge membership against a sauna pass, the clinical conversation is finally catching up to what the body may already be signaling. A debate about whether women should treat cold plunges and saunas differently than men is moving from fitness podcasts into clinical conversations, and female physiology appears to respond to thermal stress on its own terms. For anyone who ice-dips, sauna-sits or is deciding where to put her recovery dollars, the coming months will likely reshape what "best practice" looks like.
What's Happening With Cold Plunge Research
Exercise physiologist Stacy Sims, PhD, told listeners of "The Mel Robbins Podcast" that women do not need the same cold temperatures men do to benefit from cold exposure. She said icy water triggers a stronger stress response in women, pushing the body into shutdown rather than the metabolic adaptation men experience. Sims also argued that women tolerate heat better than men and can sit in a sauna, absorb the heat and trigger heat shock protein responses.
Two peer-reviewed studies back the thrust of Sims' argument:
- A 2022 study that matched seven men and seven women during cold-water immersion found women experienced elevated cardiovascular strain and nearly double the frequency of cold-induced vasodilation reactions in the toes compared with their male counterparts.
- A 2020 cross-sectional study of 117 adults found that while men and women showed similar increases in resting energy expenditure after cold exposure, hormonal shifts in leptin and adiponectin were more pronounced in women, a sign the metabolic response is gender-specific.
Why It's Happening
Three forces are driving the conversation.
The first is physiology. Danyl Bosomworth, founder of ice bath brand Brass Monkey, told The Independent that women tend to carry a higher body fat percentage, a smaller body surface area to volume ratio and a lower resting metabolic rate. "Women's bodies may prioritize blood flow to core organs, which can make extremities feel colder," he said. "They might also begin shivering earlier in response to cold as a heat-generating mechanism."
The second is hormones. Bosomworth noted that estrogen fluctuations shape recovery and inflammation across the menstrual cycle, making timing and intensity more consequential for women than men. Emma Estrela, a Level 3 practitioner of the Wim Hof Method, told Women's Health that peripheral blood flow differences mean "hands and feet may feel colder faster," which can limit tolerance for longer or colder immersions.
The third is a widening evidence gap. Mike Elliott, senior director of Banner Sports Medicine High Performance Center, told Banner Health that most of the available research is observational and shows association rather than direct cause. The sex-specific signal is strong enough to notice but thin enough to leave practitioners guessing, exactly the kind of gap that gets closed by a wave of follow-on studies.
Three Predictions for the Hot-and-Cold Therapy Sector
Prediction 1: Sex-specific protocols will become the default
The next generation of recovery guidance is likely to break from the single-protocol model and treat men and women as separate populations. For readers already cold-plunging, the practical move is to run warmer and shorter. Michael Swartzon, MD, a sports medicine physician with Baptist Health Orthopedic Care, told SELF that women trying cold exposure should "try a shorter time or a higher temperature first." Extend the session only after the body signals improvement in mood, stress, circulation and recovery.
Prediction 2: Heat may get the attention cold has been getting
Sims argues women absorb sauna heat and vasodilate more readily than men. PT and lymphatic drainage expert Sonia Rose told Women's Health that warmth has long been a "deeply intelligent" ritual for women, pointing to hot water bottles, baths and herbal teas. If the research catches up to that intuition, expect sauna use to be marketed to women as a primary modality, with cold used sparingly as an accent. If you are choosing between a plunge membership and a sauna membership this winter, the forecast favors the sauna.
Prediction 3: Cycle-aware recovery is coming
With Bosomworth and other practitioners pointing to estrogen's role, expect fitness apps, wearables and recovery brands to roll out protocols that adjust temperature, duration and timing by menstrual-cycle phase. The reader action is to start tracking how cold and heat exposure feel at different points in your cycle now, so you have personal baseline data by the time third-party tools catch up.
Practical Tips for Women
- Start cold plunges with shorter time and higher temperature, then progress gradually
- Don't force yourself to match a partner's or trainer's cold tolerance
- Track how cold and heat exposure feel at different points in your menstrual cycle
- If budget is limited, prioritize sauna over cold plunge
- Focus on signals of improved mood, stress, circulation and recovery rather than extreme temperatures
The through-line across all three predictions is simple. The one-size-fits-all plunge is on its way out, and any protocol built on male physiology, which is most of them, should be treated as a starting point rather than a prescription. For women already in the practice, that means dialing down intensity, logging responses and resisting the pressure to match a partner's or trainer's cold tolerance.
Want to track how hot-and-cold therapy affects your recovery more scientifically? The Xiaoshu Health App can sync with Apple Health to track relevant metrics, helping you log heart rate, sleep and recovery data so every thermal exposure is grounded in evidence.