An athlete in a bike helmet and jersey wearing a continuous glucose monitor, a small black patch, and holding her cell phone nearby to check her blood sugar.
Tracey Jacobs, an elite cyclist, said tracking her blood sugar with a continuous glucose monitor helped her improve her performance and reduce fatigue while training.
  • Continuous glucose monitors (CGMs) have become a hot wellness trend for people without diabetes.
  • Proponents say CMGs can help people make more personalized and proactive decisions about their health.
  • However, research isn't clear on what blood sugar levels mean, so the right context is crucial.

Elite cyclist Tracey Jacobs knew something wasn't right when easy training rides started to feel like all-out efforts.