How Continuous Glucose Monitors Reflect Exercise Response
Mar 20, 2026
As wearable health technology expands, continuous glucose monitors (CGMs) are entering the fitness space to show how workouts affect blood glucose patterns. A CGM is a small subcutaneous sensor that measures glucose in interstitial fluid in near real time. Originally designed for diabetes care, these devices now help athletes observe how fueling and training choices shape their glucose trace.
Unlike a single fingerstick reading, CGMs provide a continuous curve throughout the day. That curve can reveal how steady—or volatile—energy availability is during training. For recreational and competitive athletes alike, repeatable patterns often matter more than one-off spikes or dips…