Posted by: @openwheel

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A friend of mine was 6'-6 and played sports, but was also in the band, and when we'd march in the summer parades in late July he had a hell of a time. We'd be standing at attention in the road on that hot asphalt in our uniforms and he was always the first to step out of line and go sit down. (Which our band director emphasized we should do if the heat gave us any problem.) Within a few minutes. Every time. Just couldn't hack the heat at all.

Otherwise he has seemed healthier than most, going strong at 60, never any heart or health issues I've ever heard of. But in high school always got lightheaded and had issues in the heat. Sometimes on days when he was the only one with issues. Not a doctor so I don't know why some don't do well in the heat but I am guessing not always a heart ailment. But my friend just always said he felt like he'd pass out, he didn't say anything about his heart.

Maybe the Iowa kid just was the type that mentally would always try to tough it out. Sad, feel for his family.

I won't pretend to know what's going on in either situation, but I do know that if you're standing at attention for a length of time with your knees locked, you can pass out.  Something about the blood pooling in your legs and your BP dropping. It's even more likely if you're not drinking enough water. I saw a couple of guys around me do it back a million years ago at Boys State.

Posted by: @hooky

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but I do know that if you're standing at attention for a length of time with your knees locked, you can pass out. 

But I don't know if my friend just didn't get it. I never noticed either way, the heat didn't bother me much.