Mild Dehydration Could Mess Up Your Concentration

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Research has already shown us that enduring a heat wave without air conditioning can impair our mental performance. Now, a new paper reported by NPR shows that not drinking enough water in the summertime can have a similar impact. According to a meta-analysis published in July in the journal Medicine & Science in Sports & Exercise, even mild dehydration can negatively affect cognition.

Mindy Millard-Stafford, director of the Exercise Physiology Laboratory at Georgia Institute of Technology, looked at 33 studies dealing with dehydration. She found that subjects performed worse in a range of areas—including attention, motor coordination, and goal-oriented thinking—when they were slightly dehydrated compared to when they had consumed enough water that day.

She defined mild dehydration as fluid loss equivalent to about 2 percent of body mass. On a hot summer day, reaching this stage can happen surprisingly fast. If you're hiking in the heat, it might take you an hour to become mildly dehydrated, and if you're going on an intense run, it can take just 30 minutes to sweat out 2 percent of your mass.

That level of dehydration isn't too noticeable (you may just start to feel thirsty), but if you have to do something that requires your full attention, it makes a big difference. In one study published last year, female subjects who were 1 percent dehydrated made 12 percent more errors while playing a game that required them to think quickly. (That paper was funded by PepsiCo, which sells bottled-water brands like Aquafina and Propel, but the researchers designed the study independently, according to NPR.)

Luckily, the brain fog that comes with dehydration has a simple antidote: a glass of water. The biggest roadblock keeping you from staying hydrated may be your inability to recognize dehydration in the first place. To see if you're getting enough water, use this easy skin test throughout the day.

[h/t NPR]

A Custom Wheelchair Allowed This Brain-Injured Baby Raccoon to Walk Again

фотограф/iStock via Getty Images
фотограф/iStock via Getty Images

Animal prosthetics and wheelchairs allow dogs, cats, and even zoo animals with limited mobility to walk again, but wild animals with disabilities aren't usually as lucky. Vittles, a baby raccoon rescued in Arkansas, is the rare example of an animal that was severely injured in its natural habitat getting a second shot at life.

As Tribune Media Wire reports, Vittles came to wildlife rehab specialist Susan Curtis, who works closely with raccoons for the state of Arkansas, with a traumatic brain injury at just 8 weeks old. The cause of the trauma wasn't clear, but it was obvious that the raccoon wouldn't be able to survive on her own if returned to the wild.

Curtis partnered with the pet mobility gear company Walkin' Pets to get Vittles back on her feet. They built her a tiny custom wheelchair to give her balance and support as she learned to get around on her own. The video below shows Vittles using her legs and navigating spaces with help from the chair and guidance from her caretaker.

Vittles will likely never recover fully, but now that she's able to exercise her leg muscles, her chance at one day moving around independently is greater than it would have been otherwise. She now lives with her caretaker Susan and a 10-year old raccoon with cerebral palsy named Beetlejuice. After she's rehabilitated, the plan is to one day make her part of Arkansas's educational wildlife program.

[h/t Tribune Media Wire]

Why You Should Never Shower With Your Contact Lenses In

belchonock/iStock via Getty Images
belchonock/iStock via Getty Images

Contact lenses offer a level of convenience for those with less-than-perfect vision that glasses can hardly compete with, but that doesn’t mean the daily struggle of taking them in and out of your eyes doesn’t wear on you. If you get a little lazy and decide it’s fine to leave them in your eyes during showers or pool parties, think again.

According to Popular Science, a 41-year-old woman in the UK lost sight in her left eye as a result of frequently showering and swimming without removing her contacts. The culprit was Acanthamoeba polyphaga, a protozoa that crawled into her eye and caused a cornea infection called Acanthamoeba keratitis. After two months of pain, blurry vision, and light sensitivity, the woman sought medical attention at the Manchester Royal Eye Hospital, where doctors discovered a ring shape in her left eye and a hazy layer covering her cornea. Upon testing her vision, they found that her left eye was now 20/200, which counts as legally blind in the United States.

Leela Raju, an ophthalmologist and cornea specialist at New York University, told Popular Science that the single-celled organisms “can be anywhere,” including pools, hot tubs, showers, dirty saline solution containers, and even tap water. Lens-wearers make up around 85 percent of those who get infected, and experts think it may be because the amoeba can latch onto a contact lens more easily than a bare eye.

Though Popular Science reports that Acanthamoeba keratitis only affects one or two people out of every million contact wearers each year, that’s no reason not to be careful. If you do catch it, you’ll likely need a cornea transplant, and even that won’t necessarily restore your eyesight to its previous state—after her transplant, the UK woman’s left eye now has 20/80 vision.

“It’s just a long road, for something that’s totally preventable,” Raju says. In addition to removing your contacts before swimming, showering, or sleeping, you should also refrain from reusing saline solution, make sure your contact case is completely clean and dry before filling it with more solution, and check out these other tips.

[h/t Popular Science]

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