Q. What if my partner doesn’t want to sleep at altitude but still wants to sleep in the same bed?

A. This is not a problem if you have a double bed. The Oxy Cube fits over a standard size pillow, comfortably allowing enough space for another person to sleep in the same bed. 


Q. Are there any product reviews on your products?

A. We recently had a review in the triathlon220 magazine. Check out our ambassador page and instagram to find out who uses our products.



How does it work?

The Stealth Generator is used with a tent to create a hypoxic (low oxygen) environment for sleeping. The generator takes in fresh air and removes some of the oxygen, so that low-oxygen air flows into the tent for you to breathe in. The tent is not completely sealed so that hypoxic air is continually being flushed through the tent at a rate of up to 50L per minute. This keeps your sleeping environment fresh, clean and safe. An oxygen analyzer can measure the percentage of oxygen in your tent.



How much is the running cost?

The Stealth Generator has a low operating cost, approximately £1 per night that the generator is being used.



What is the power source?

The electrical requirement is 312 W/ 220-240 V.


How much noise does the Stealth Generator make?

The Stealth Generator produces 40 dBA of sound and can be described as a low humming noise. We would recommend that the generator is positioned outside the room you are sleeping in to minimise disturbance.


What happens if the electric fails?

If there is a power failure and airflow from the generator stops, room air can enter your tent via the small gaps around the edge. This would allow you to continue breathing and keep you safe.


Is it safe?

Yes, providing the equipment is used correctly and our guidelines are followed. You will be breathing in the same air that you normally breathe, just with a lower concentration of oxygen. The human body initiates a series of physiological adjustments to compensate for this, which result in the desired adaptations that can improve performance. However, we recommend that you should speak to your doctor before using any of our products.



How long do I need to sleep at altitude before I see results?

Typically, it takes 4-6 weeks (of 8-12 hours per night) before adaptations in the blood are observed and you start to feel the benefits. However, everyone responds at slightly different rates and some individuals may notice differences sooner. If you don’t usually sleep for 8-12 hours per night, consider relaxing in your tent (e.g. reading a book) for a couple of hours before going to sleep to extend your exposure time to the optimal duration.




How can I monitor my responses to sleeping at altitude?

It is recommended that you measure your oxygen saturation (SPO2) levels every morning using a pulse oximeter inside the tent. A pulse oximeter estimates the percentage of oxygen bound to your haemoglobin in the blood. At sea-level you can expect your SPO2 to be close to 100% at rest. When sleeping at altitude, your SPO2 should be ~90-95% to stimulate adaptation.




Will sleeping at altitude affect my training?

If you follow the guidelines provided with your Stealth Generator, sleeping at altitude should not affect your training. You will be able to continue training as normal. However, you may experience a small reduction in sleep quality initially, as you adjust to the lower oxygen level and a change in sleeping environment.



What happens if I sleep too high?

Your sleep quality will certainly be affected and you may experience mild symptoms such a headache, fatigue and dehydration. This is why it is important to increase the altitude you sleep at gradually, following the guidelines that are provided with your Stealth Generator.


Should I sleep at altitude all year round?

For optimal adaptation and performance, sleeping at altitude should be split into periods, just like your training is. Guidelines for optimal use will be provided with your Stealth Generator.


How long should I stop sleeping in the tent before a big race?

We recommend that you practice this in training or for a low-key race first. Typically, we’d suggest coming out of the tent 1-3 nights or 10 nights before a big race. Remember to factor in nights away from home if you’re traveling abroad or a long-distance to a race.


Who can benefit from sleeping at altitude and do I have to be an elite athlete?

You don’t need to be an elite athlete to benefit. We have many satisfied clients of different athletic abilities who have improved their performance through sleeping at altitude. We also have non-athlete clients who use our products to improve their general health and wellbeing.


What is the difference between training at altitude and sleeping at altitude?

‘Live High, Train Low’ is the simulated altitude training method that best describes sleeping in an altitude tent. This traditional method provides enough exposure to altitude overnight to stimulate the production of new red blood cells, whilst still allowing you to produce quality training at sea-level during the day. Whilst sleeping at altitude, your training program can be supplemented with training sessions at altitude to enhance tolerance and accelerate adaptation to altitude. Although a ‘Live Low, Train High’ strategy alone is unlikely to produce the same physiological and performance benefits as sleeping at altitude.


Will I lose weight from sleeping at altitude?

There is evidence that altitude exposure can lead to weight loss, likely due to increases in metabolism and the appetite-suppressing hormone, leptin. It’s important to monitor your body weight during altitude exposure, as large fluctuations can increase the risk of injury and illness.


Are there any other adaptations I can expect from sleeping at altitude?

An increase in red blood cells has been shown to increase VO2max (i.e. your aerobic capacity) and endurance performance. Your ability to recover within and between training sessions will also be improved, therefore allowing you to train harder and achieve greater increases in speed, strength and endurance.

Should I be taking any supplements to support physiological adaptation?

Check out our blogpost “Nutrition at Altitude”. In summary, exposure to altitude increases the body’s need for iron, to support the increase in new red blood cell production. Some individuals may need to supplement with iron whilst sleeping at altitude to ensure optimal adaptation and to maintain a healthy iron balance. However, we recommend that you consult your doctor before taking supplements to determine your current iron level and whether additional supplementation is required.


Are there any scientific studies that prove this works?

Check out our blogpost “Science Behind cont.”  for research articles relating to altitude training and simulation.


Do you offer a coaching service to complement the altitude system?

This is something we are working on. However we can offer general advice, so please get in touch.