Which of the following groups is at the highest risk of dehydration-related injuries?

The group at the highest risk of dehydration-related injuries is soldiers who are not accustomed to heat. This is because individuals who are unaccustomed to high temperatures may not have adequately adapted physiological responses to regulate their body temperature and maintain hydration levels. When exposed to hot environments, these soldiers may not sweat efficiently, leading to a greater likelihood of dehydration. The body relies heavily on sweating to cool itself, and inefficient thermoregulation can increase the risk of heat-related illnesses.

In contrast, well-hydrated soldiers are less likely to be at risk since they will have sufficient fluid levels to cope with physiological demands. Soldiers who consume energy drinks might be at some risk due to rapid consumption of caffeine and sugars, but it does not automatically equate to dehydration without considering hydration levels. Soldiers who train indoors are typically shielded from excessive heat exposure, which helps in maintaining hydration.