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Characterization of Individualized Glycemic Excursions during a Standardized Bout of Hypoglycemia-Inducing Exercise and Subsequent Hypoglycemia Treatment-A Pilot Study

J. Brož, MD. Campbell, J. Urbanová, MA. Nunes, L. Brunerová, D. Rahelić, D. Janíčková Žďárská, A. Taniwall, M. Brabec, V. Berka, J. Michalec, J. Polák

. 2021 ; 13 (11) : . [pub] 20211121

Language English Country Switzerland

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc22003182

Grant support
00064203 Ministry of Health, Czech Republic

The glycemic response to ingested glucose for the treatment of hypoglycemia following exercise in type 1 diabetes patients has never been studied. Therefore, we aimed to characterize glucose dynamics during a standardized bout of hypoglycemia-inducing exercise and the subsequent hypoglycemia treatment with the oral ingestion of glucose. Ten male patients with type 1 diabetes performed a standardized bout of cycling exercise using an electrically braked ergometer at a target heart rate (THR) of 50% of the individual heart rate reserve, determined using the Karvonen equation. Exercise was terminated when hypoglycemia was reached, followed by immediate hypoglycemia treatment with the oral ingestion of 20 g of glucose. Arterialized blood glucose (ABG) levels were monitored at 5 min intervals during exercise and for 60 min during recovery. During exercise, ABG decreased at a mean rate of 0.11 ± 0.03 mmol/L·min-1 (minimum: 0.07, maximum: 0.17 mmol/L·min-1). During recovery, ABG increased at a mean rate of 0.13 ± 0.05 mmol/L·min-1 (minimum: 0.06, maximum: 0.19 mmol/L·min-1). Moreover, 20 g of glucose maintained recovery from hypoglycemia throughout the 60 min postexercise observation window.

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$a The glycemic response to ingested glucose for the treatment of hypoglycemia following exercise in type 1 diabetes patients has never been studied. Therefore, we aimed to characterize glucose dynamics during a standardized bout of hypoglycemia-inducing exercise and the subsequent hypoglycemia treatment with the oral ingestion of glucose. Ten male patients with type 1 diabetes performed a standardized bout of cycling exercise using an electrically braked ergometer at a target heart rate (THR) of 50% of the individual heart rate reserve, determined using the Karvonen equation. Exercise was terminated when hypoglycemia was reached, followed by immediate hypoglycemia treatment with the oral ingestion of 20 g of glucose. Arterialized blood glucose (ABG) levels were monitored at 5 min intervals during exercise and for 60 min during recovery. During exercise, ABG decreased at a mean rate of 0.11 ± 0.03 mmol/L·min-1 (minimum: 0.07, maximum: 0.17 mmol/L·min-1). During recovery, ABG increased at a mean rate of 0.13 ± 0.05 mmol/L·min-1 (minimum: 0.06, maximum: 0.19 mmol/L·min-1). Moreover, 20 g of glucose maintained recovery from hypoglycemia throughout the 60 min postexercise observation window.
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