You are leading a group through Big Bend National Park in Te…

You are leading a group through Big Bend National Park in Texas. It’s been quite a warm day, pushing 95 degrees F for most of your hike. There is an older gentleman along for the hike in good shape with no medical co-morbidities. He starts to complain of some of the symptoms of heat stroke. Why do older adults have a harder time regulating their body temperatures?