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. Author manuscript; available in PMC: 2020 Sep 23.
Published in final edited form as: Wilderness Environ Med. 2019 Nov 18;30(4 Suppl):S121–S140. doi: 10.1016/j.wem.2019.10.003

Table 2.

Environmental effects on diabetes

Environmental factor Effect on blood glucose Other effects and risks for wilderness athletes with diabetes
Extreme altitude (>4000 m) Increases Capillary blood glucose testing overestimation
Moderate altitude (>1500 – <4000 m) Unknown
Extreme heat No direct effect Increased heat illness, insulin becomes nonviable, increased insulin absorption
Extreme cold Variable Possible poor insulin absorption, increased cold injuries, insulin freezing