Okada, Y., Yoto, T. Y., Suzuki, T., Sakuragawa, S., & Suigiura, T. (2013). Wearable ECG Recorder with Acceleration Sensors for Monitoring Daily Stress: Office Work Simulation Study. 35th Annual International Conference of the IEEE EMBS, 4718-4721.
This study tested the usability of a wearable device consisting of an accelerometer, amplifier, microcomputer, memory card, and electrodes to monitor stress levels (device was worn around the neck and taped to the chest or put in a pocket) Subjects were two male college students who did not drink, smoke, or use drugs during the study. Study took place over three days in a simulation of office work. Results indicated the device was easy to use and investigators observed both short-term and circadian rhythms of acceleration sensor activity related to stress.