If your workout isn’t slightly dystopian, is it even 2026? Somewhere between ice baths, Hyrox, and wearing glucose monitors like jewellery, intermittent hypoxia training (IHT)—voluntarily breathing less oxygen (yes, on purpose) has entered the wellness chat. Think altitude training minus the mountain. Just a mask, a chamber, and a controlled drop in oxygen, forcing your body to adapt. Why is everyone suddenly talking about it? Because it sits right at the intersection of three things Gen Z is obsessed with: performance (gym, brain, skin), biohacking culture, and doing the most with the least time.
So, what’s actually happening in your body?
At its core, IHT alternates between low-oxygen and normal-oxygen states, pushing the body into a cycle of stress and adaptation. According to nutritionist Kinita Kadakia Patel, a metabolic reset and body transformation specialist, this shift nudges the body to become more efficient at using oxygen, increasing red blood cell production while also raising the demand for carbohydrates, iron, and B-vitamins to support energy metabolism. “Intermittent hypoxia creates alternating low-oxygen and normal-oxygen states…similar to what happens during altitude adaptation,” she explains, pointing to how the body is essentially being trained to perform under constraint.
She adds that this process isn’t entirely seamless. The re-oxygenation phase creates a brief oxidative stress response, making antioxidants like vitamins C and E important for recovery. At the same time, the body leans more heavily on carbohydrate metabolism in low-oxygen conditions, while over repeated cycles these adaptations can improve mitochondrial efficiency and overall oxygen utilisation.
While IHT is positioned as a performance hack, it’s fundamentally a stress signal.
Fitness expert Shivohaam Bhatt, the trainer behind some of Bollywood’s most athletic bodies, describes it as a form of “controlled stress, and quite an aggressive one”, where reduced oxygen availability directly impacts mitochondrial function and activates survival pathways like HIF-1. In the right setup, this can improve endurance and efficiency, but he cautions that the body is essentially responding with “I’m under threat, I need to adapt quickly”. In someone already running on poor sleep, high stress or burnout, that added load can backfire, showing up as fatigue, poor recovery, and rising cortisol instead of better performance.
The performance promise (and the reality check)
Research suggests IHT can improve aerobic capacity, endurance, and oxygen efficiency, but the results depend heavily on how (and for whom) it’s used. When it comes to fat loss, however, the hype doesn’t quite hold. Kadakia points out that low oxygen shifts the body towards carbohydrate usage (glycolysis) rather than fat burning.
While metabolic efficiency and insulin sensitivity may improve, IHT isn’t a meaningful driver of fat loss, and it definitely doesn’t replace a solid diet or resistance training.
Bhatt echoes this, adding that fat loss doesn’t magically accelerate just because oxygen is low. “Excessive stress can impair fat metabolism and lead to stubborn fat retention, especially around the abdomen,” he says, particularly when recovery isn’t dialled in. For most people, he adds, the issue isn’t a lack of advanced tools but an overload of stress: “The body doesn’t differentiate between stress from low oxygen, work pressure or poor sleep. It all adds up in the same system.”
Inside the studio: the altitude effect
This is where it starts to feel more real. Pilates instructor Namrata Purohit, who has introduced altitude-style training in her studios, says the appeal has always been about finding efficient, mind-body-led methods that deliver measurable results. “The improvement is almost 15 per cent in VO₂ max within four to six sessions of 20 to 30 minutes, which improves overall performance for professional athletes and is also a great tool for anyone looking to improve their fitness levels.”
From her experience, the benefits go beyond endurance. Training in reduced-oxygen environments can increase red blood cell count, help clear lactic acid more efficiently, boost mitochondrial density, improve energy production, and enhance lung capacity and respiratory strength. This, she says, makes altitude-style training relevant not just for athletes but also for everyday fitness enthusiasts, trekkers, and racket sport players looking to build stamina and recover better.
Can you eat your way to better hypoxia results? Not really. But you can support it.
Kadakia emphasises that IHT doesn’t require aggressive supplementation, but it does demand a strong nutritional base. Supporting oxygen transport, mitochondrial function, and recovery through iron, antioxidants, nitrates, and key micronutrients can help the body adapt better, alongside getting carbs, protein, and hydration right.
Athletes have been doing this forever
Long before hypoxia became a studio trend, endurance athletes were already training their bodies to perform under low-oxygen conditions—through altitude, terrain, and sheer distance. Endurance runner Kieren D'Souza, who has spent years training in high-altitude environments, says the reality is far less glamorous than a controlled studio setup. “When you first get to a high altitude, it feels horrible… You can barely breathe, everything is harder, and your training intensity drops significantly,” he says. Over time, the body adapts, but not without trade-offs like slower recovery and reduced output in the short term.
That’s where simulated hypoxia has an edge. According to him, tools like altitude rooms and masks offer a more controlled way to increase red blood cell count and oxygen efficiency without completely compromising training quality. “You can get the benefits of altitude without the struggles of living there,” he explains while noting that these systems still don’t fully replicate real altitude conditions. At the same time, he’s clear that context matters. “A lot of people focus on the 1 per cent and ignore the 99 per cent basics,” he says, emphasising that foundational training should always come first.
For athletes in fast-paced, high-intensity sports, the relevance plays out slightly differently. Farah Trehan, chief creative officer, Aufside, and national badminton player, points out that the idea of endurance itself is evolving. “Trying to say some sports are high-endurance and others aren’t isn’t really fair anymore. The demands across sports are changing,” she says, noting that modern sport—whether it’s tennis, football, or badminton—often requires sustained intensity in bursts, making oxygen efficiency increasingly relevant across disciplines.
From that lens, hypoxia-style training isn’t limited to traditional endurance sports. “It’s something that can benefit anyone who wants to play at a high level,” Trehan says, adding that it’s especially true in unpredictable tournament settings where athletes don’t always have the luxury of long-term, environment-specific preparation. At the same time, breath control remains one of the most accessible tools. “There are simple breath-work exercises you can do even at home… I do them before matches and it definitely helps you feel fresher,” she says, referring to controlled breathing and breath-hold techniques many athletes already use to stay composed and recover quickly on court.
How does it compare to traditional training?
According to Bhatt, traditional methods like strength training and well-structured HIIT remain more sustainable and easier to build into everyday routines. They improve insulin sensitivity, build muscle, and support mitochondrial function without constantly pushing the body into survival mode.
IHT, on the other hand, is an advanced tool, not a shortcut. And not everyone needs to train like they’re summiting Everest. If you have iron deficiency, anaemia, thalassemia, or respiratory and cardiovascular conditions, Kadakia advises avoiding IHT or only attempting it under supervision. Bhatt adds that it’s best suited for high-performance athletes in controlled environments, not for those already dealing with fatigue, stress, or hormonal imbalances.
Purohit echoes a similar sentiment: “However much we would like to see altitude training become a go-to, we are still far away from it becoming mainstream.” She also points out a larger mindset issue in fitness: “People still equate a good workout with pushing to the point where they can’t move, which can actually lead to injury. We believe in keeping it safe, simple and smart.”
Intermittent hypoxia training is science-backed, performance-driven, and slightly extreme—but it’s not foolproof. It can improve endurance and oxygen efficiency in the right context. But as Bhatt puts it, real fitness isn’t about constantly pushing the body into survival mode; it’s about creating the conditions for it to recover, adapt, and actually get stronger. Because right now, even breathing isn’t basic anymore.
