The science behind

The GRASPOR device monitor blood oxygenation (by Near InfraRed Spectroscopy, NIRS) and is equipped with LED’s which near infrared light penetrates the tissue to a depth of approx. 1.7cm to detect oxygen levels within the muscle.

What do we measure?

Muscle Oxygen

GRASPOR is using Near Infrared Spectroscopy (NIRS) where light in the near-infrared spectrum is shone into the tissue and differences detected in returned light. Since human tissue absorbs relatively little light in the near-infrared range, it is possible to exploit differences in absorption of light in oxygenated and deoxygenated hemoglobin to detect the relative concentration of oxygenated blood in the muscle.

Muscle Oxygen, is automatically calibrated at the start of each recording and you should either sit or stand still until a value is shown for Muscle Oxygen.


Getting started




Terms of service

If you need any additional help, dont hesitate to contact our support team on