Ben GreenfieldFounder, Ben Greenfield Life

Continuous Blood Glucose Monitor Values

22 Jun 2018 · 1 min

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Ben Greenfield demonstrates and comments on readings from a Freestyle Libre continuous glucose monitor during and after a workout. He describes typical target ranges (around 70–90 mg/dL), warns that sustained readings above 120 mg/dL warrant reconsidering the meal, notes the sensor scans last about 10 days, and reports a ~30-point glucose spike during a post-workout sauna followed by a drop after a cold plunge.

Questions this video answers

About 10 days.

About 70–90 mg/dL.

Above 120 mg/dL.

About a 30-point spike.

Chapters

Now checking my blood glucose. Freestyle Libre. Check that out. See, I got one there and it's attached with the needle. And every time I wave the sensor, it tests my blood glucose for the next 10 days. Did a workout and this is what it looks like right now. And this is how it's looked all day. Kind of up and down. It's pretty good though. Try to keep your blood glucose between about 70 and 90 most of the day, and if it goes up above 120 for an extended period of time, you should probably reconsider whatever meal you ate. Check that out. My post workout sauna session actually spiked my blood glucose 30 points. That's crazy. Probably a little bit of glycogenolysis from the liver. See? Then I jump in the cold pool and 10 minutes later, after the cold pool, looks like this.