| abstract |
Disclosed herein are embodiments of a system that utilizes measurements indicative of respiration in order to estimate an aerobic activity parameter, such as oxygen consumption (VO 2 ), maximal oxygen consumption (VO 2 max), or energy expenditure (EE). In one embodiment, this system includes at least one inward-facing head-mounted thermal camera (CAM) and a computer. Each CAM, from among the at least one CAM, is configured to take thermal measurements of a region below the nostrils (TH RBN ) of a user. TH RBN are indicative of an exhale stream of the user, such as an exhale stream from one, or both, of the nostrils and/or the exhale from the mouth. The computer calculates, based on TH RBN , the aerobic activity parameter. Optionally, the computer generates feature values based on data comprising TH RBN and utilizes a model to calculate the aerobic activity parameter based on the feature values. |