Share this article Share this article CAMBRIDGE, Mass., March 17, 2021 /PRNewswire/ -- We all know that 2020 looked quite different on the outside, but how did it look on the inside? InsideTracker, the leading ultra-personalized performance system, looked at pre- and post-lockdown blood biomarker data among thousands of users to provide an objective measure of the stress and lifestyle impacts of the past year. Blood glucose was among the biomarkers that shifted out of optimal range during lockdown. InsideTracker's user base is heavily weighted towards high performers who strive for optimal physical and cognitive health, such as elite strength and endurance athletes and other health-conscious people. Yet, even among a highly motivated sample group, 2020 left a mark.