Most people associate winter with increased danger for loss of balance and falls. But did you know that summer can be just as dangerous?
The hazards are different, of course. A recent French study showed that dehydration can weaken cognitive function as well as the muscles. This means that recognition of a hazard can be delayed, as well as the reaction time necessary to avoid it.
Many dehydration studies have been carried out on athletes and others under extreme conditions, studying dizziness, loss of function and loss of electrolytes, so the French study is interesting in that it looked at normal women, doing regular tasks, half of whom went 24 hours without water or other drinks, whilst the control group were kept hydrated.
The group suffering from dehydration experienced higher heart rate (though not in the clinically significant range), sleepiness, confusion and decreased alertness.
The human balance system relies on good input from the senses (the soles of the feet, the vestibular system – where the limbs are in space – inner ear, eyes) and strong communication between the brain and muscles to react to that stimuli, in order to keep the body balanced and moving around safely.
In parts of the world where summer is particularly hot, dehydation can occur surprisingly quickly. One of the side effects of aging is that it is harder to sense when you are dehydrated, which means that often older adults suffer from mild to moderate dehydration without even being aware of it.
In the real world, this can have significant consequences as in summer people often travel to new locations, where their balance is put under further pressure. See this article published in The Traveling Boomer blog for some of the other ways that travel can impact balance and fall risk.
So buy up that watermelon, or whip up your favorite mocktail if you’re bored of just plain water. Make staying hydrated fun, whether you’re going to the gym, hanging out with friends, or absorbing a new culture.