Thank you for asking questions that I should have clarified a lot more.
Unknown, I am not a junk food or extreme sugar kind of guy. I do like a bowl of ice cream often enough though
I don't drink coffee or soda and only have sweet tea once in a while. I looked into the overhydrating thing to see if it was a possibility. I am going to make a trip to my doctors to see what they say. As for the heat injury happening more and more frequently after you have had it once you are correct. Although not something I am proud of I have been severely heat sick requiring iv treatment a total of 8 times now. 4 of those over the past two years. I used to go through the standard stages of cramps, headache and then vomiting. Now, there are no stages I simply crap out and don't even feel it coming.
XJ During our live fire training we are only in full turnout gear as long as the evolution takes to complete which can vary. We don our gear a few minutes before the evolution and then man the secondary hose line for the team inside. Keep in mind we only do one live fire training for class. That being said if we have an actual fire that we respond to there is no telling how long we could be in full gear. Unfortunately there are no real vents to speak of. A good cardio routine would certainly build up your stamina but might not help much with the heat issue. Some guys do prepare by worrkng as long as possible in hot conditions without risking injury
I baled hay once to help a friend out when I was younger. I was in good shape but man that sucked
Orbean Almost all of my jobs have been outside work my entire life. When I moved to Florida and started doing wildland fire fighting the heat definitely threw me for a loop. I slowly got used to it and proceeded from there. Now that I am pursuing being a structural firefighter the whole game is changed. Heavier gear and a lot of different situations. I spoke to my chief about it as it is concerning me a great deal. He said even seasoned structure guys get heat sick. He's had guys get about half way through a fire start cramping up and go to the EMS guys to get some iv fluids and go right back to work. He said my situation is much much different. Hope the doctor can find something wrong in a way so that I can fix it. I just don't have it in me to bow out of a job or say I can't finish. I don't want to get injured and definitely don't want to risk the safety of the guys I am with.