{"id":2240342,"date":"2019-12-23T14:31:09","date_gmt":"2019-12-23T19:31:09","guid":{"rendered":"https:\/\/www.futurity.org\/?p=2240342"},"modified":"2019-12-23T14:31:09","modified_gmt":"2019-12-23T19:31:09","slug":"hydration-older-women-cognition-drinking-water-2240342-2","status":"publish","type":"post","link":"https:\/\/www.futurity.org\/hydration-older-women-cognition-drinking-water-2240342-2\/","title":{"rendered":"Too little (or too much) water may affect older women’s cognition"},"content":{"rendered":"
Not getting enough water is enough to make you feel sluggish and give you a headache, but a new study suggests for older women, too little hydration may also relate to cognitive performance.<\/p>\n
Researchers investigated whether hydration levels and water intake among older adults related to their scores on several tests designed to measure cognitive function. They found that among women, lower hydration levels were associated with lower scores on a task designed to measure motor speed, sustained attention, and working memory.<\/p>\n
The researchers did not find similar results for men.<\/p>\n
“The study gives us clues about how hydration<\/a> and related drinking habits relate to cognition in older adults,” says Hilary Bethancourt, a postdoctoral scholar in biobehavioral health at Penn State and first author of the paper in the European Journal of Nutrition<\/a><\/em>.<\/p>\n “This is important because older adults already face increased risk of cognitive decline with advancing age and are often less likely than younger adults to meet daily recommendations on water intake.”<\/p>\n The researchers found similar results when participants drank too much water, says senior author Asher Rosinger, professor in global health, who also directs the Water, Health, and Nutrition Laboratory.<\/p>\n “We found a trend suggesting overhydration may be just as detrimental to cognitive performance as dehydration for older adults,” Rosinger says.<\/p>\n “Because of this, being in the ‘sweet spot’ of hydration seems to be best for cognitive function, especially for tasks requiring sustained attention.”<\/p>\n The researchers say scientists have long suspected that dehydration may have an effect on cognitive performance. However, previous studies have largely focused on young, healthy people who are dehydrated after exercise and\/or being in the heat.<\/p>\n Because exercise<\/a> and elevated ambient and body temperatures can have their own, independent effects on cognition, she and the other researchers were interested in the effects of day-to-day hydration status in the absence of exercise or heat stress, especially among older adults.<\/p>\n “As we age, our water reserves decline due to reductions in muscle mass, our kidneys become less effective at retaining water, and hormonal signals that trigger thirst and motivate water intake become blunted,” Bethancourt says.<\/p>\n “Therefore, we felt like it was particularly important to look at cognitive performance in relation to hydration status and water intake among older adults, who may be underhydrated on a regular basis.”<\/p>\n For the study, the researchers used data from a nationally representative sample of 1,271 women and 1,235 men 60 years of age or older. They collected data from the Nutrition and Health Examination Survey. Participants gave blood samples and were asked about all foods and drinks consumed the previous day.<\/p>\n The researchers calculated hydration status based on concentrations of sodium, potassium, glucose, and urea nitrogen in participants’ blood. They measured total water intake as the combined liquid and moisture from all beverages and foods.<\/p>\n Participants also completed three tasks designed to measure different aspects of cognition, with the first two measuring verbal recall and verbal fluency, respectively.<\/p>\nJust the right amount of hydration<\/h3>\n
Total water intake<\/h3>\n