You may notice your blood glucose rising during high-intensity workouts, but that’s nothing to worry about. In fact, these short-term increases are part of a healthy physiological response. Over time, intense exercise helps lower fasting glucose levels and enhances insulin sensitivity, both of which contribute to improved metabolic flexibility and more stable glucose control.
This temporary rise simply shows that your body is tapping into its stored energy because the workout intensity is too high to rely mainly on fat for fuel.
It’s important to remember that this kind of glucose spike is not the same as one caused by sugary foods. Exercise-driven increases are beneficial, promoting greater insulin sensitivity and metabolic health in the long run.