iSpO2 provides accurate, real-time oxygen saturation (SpO2), pulse rate (PR), and perfusion index (PI) readings – ideal for anyone who desires access to accurate health data through their mobile devices.

Stig Severinsen, Ph.D. in medicine, a four-time World Champion freediver and owner of multiple Guinness World Records, including history’s longest breath-hold of 22 mintues, uses iSpO2 as part of his regimen.

"Training for extreme records under extreme conditions is always a huge challenge," Severinsen said. "In such situations it is of great value to be able to perform noninvasive and accurate measurements of my heart rate and oxygen levels with a state-of-the-art device. Masimo has created a clever device that not only displays your measurements in real time — even during motion and states of low perfusion in cold conditions — but it also allows you to store and share data with people in your team.

"I would recommend Masimo’s iSpO2 to anyone interested in health and fitness — understanding what goes on inside your body is paramount to improving performance," he added.

Dr. Mark Hom, M.D., co-author of forthcoming exercise books with three-time Tour de France champion Greg LeMond, and Dr. Glenn A. Gaesser, Ph.D., said: "Although we advocate intense training, we don’t recommend that healthy athletes train to the point of oxygen desaturation (i.e., cyanosis). However, our preliminary testing with the iSpO2 has shown that it has the accuracy and repeatability to show subtle changes in athletic oxygenation: specifically in warm-up, steady state, super high intensity, and recovery. And as an added benefit, the iSpO2 is compact enough to be useful when training on the road or track."

"This pulse oximeter is without a doubt the best one available for the consumer market," said Dr. Kirk Shelley, M.D., PhD, professor of anesthesiology at Yale University in New Haven, Conn. "Masimo uses impressive digital signal processing combined with proprietary light emitting diode (LED) technology. If you need a serious pulse oximeter, this is the one to get."