Dr. Cathy Goldstein is a professor of neurology at the University of Michigan Sleep Disorders Centre. She studies sleep monitors, including their capabilities and limitations, and says many collect inaccurate data that contradicts advice from doctors. In fact, studies show overuse of wearable devices used during exercise can increase health anxiety. Dr. Goldstein joins Susana Lei'ataua to discuss whether there are any advantages to data collected by sleep trackers - or whether it's all useless.
Photo: ERIC AUDRAS
