The Zephyr BioHarness is a device that can monitor and record physiological responses such as heart rate, breathing rate, posture and activity. We wanted to know if the Zephyr BioHarness would provide reliable results when worn by males and females of different ages while doing a fitness test.

We wanted to know if the Zephyr BioHarness and Fitbit Charge are able to detect changes in heart rate, breathing rate and number of steps taken over time.

We wanted to know if the Zephyr BioHarness and Fitbit Charge actually measure what they’re supposed to measure and whether they report the same results and can be used in place of each other.