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Home SCIENCE NEWS Medicine & Health

Exercise and nutrition regimen benefits physical, cognitive health

October 19, 2020
in Medicine & Health
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12-week double-blind control trial in 148 Air Force airmen

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Credit: Photo by L. Brian Stauffer

CHAMPAIGN, Ill. — Researchers studied the effects of a 12-week exercise regimen on 148 active-duty Air Force airmen, half of whom also received a twice-daily nutrient beverage that included protein; the omega-3 fatty acid, DHA; lutein; phospholipids; vitamin D; B vitamins and other micronutrients; along with a muscle-promoting compound known as HMB. Both groups improved in physical and cognitive function, with added gains among those who regularly consumed the nutritional beverage, the team reports.

The findings appear in the journal Scientific Reports.

Participants were randomly assigned to the two groups. The exercise regimen combined strength training and high-intensity interval aerobic fitness challenges. One group received the nutritional beverage and the other consumed a placebo beverage that lacked the added nutrients. Neither the researchers nor the participants knew who received the nutrient-enriched beverage or placebo.

“The exercise intervention alone improved strength and endurance, mobility and stability, and participants also saw increases in several measures of cognitive function. They had better episodic memory and processed information more efficiently at the end of the 12 weeks. And they did better on tests that required them to solve problems they had never encountered before, an aptitude called fluid intelligence,” said Aron Barbey, a professor of psychology at the University of Illinois at Urbana-Champaign who led the study with postdoctoral researcher Christopher Zwilling.

“Those who also consumed the nutritional supplement saw all of these improvements and more. For example, they were better able to retain new information in their working memory and had quicker responses on tests of fluid intelligence than those taking the placebo,” Barbey said.

Physical power increased in both groups as a result of the physical training, Zwilling said.

“Power is a measure of physical fitness that is based on several factors, such as how fast a participant can pull a heavy sled over a set distance, how far they can toss a weighted ball, and how many pushups, pullups or situps they can perform in a set time period,” he said.

The physical training reduced participants’ body fat percentage and increased their oxygen-uptake efficiency, or VO2 max. The airmen also performed better than they had initially on several measures of cognitive function. The most notable of these was an increase in the accuracy of their responses to problems designed to measure fluid intelligence.

“But we also wanted to know whether taking the supplement conferred an advantage above and beyond the effect of exercise,” Zwilling said. “We saw that it did, for example in relationship to resting heart rate, which went down more in those who took the supplement than in those who didn’t.”

Participants who consumed the nutritional beverage also saw greater improvements in their ability to retain and process information. And their reaction time on tests of fluid intelligence improved more than their peers who took the placebo, the researchers found.

“Our work motivates the design of novel multimodal interventions that incorporate both aerobic fitness training and nutritional supplementation, and illustrates that their benefits extend beyond improvements in physical fitness to enhance multiple measures of cognitive function,” Barbey said.

The U. of I. team conducted the intervention with study co-author Adam Strang, a scientist in the Applied Neuroscience Branch of Wright-Patterson Air Force Base near Dayton, Ohio, along with his colleagues in the Air Force Research Laboratory. The U. of I. team also worked with research fellow and study co-author Tapas Das and his colleagues at Abbott Nutrition, who led the design of the nutritional beverage, which is a mixture of nutrients targeting both muscle and brain. The specially designed beverage provided ingredients that previous studies have shown are associated with improved physical cognitive function.

###

This work was conducted through a partnership between the U. of I. and Abbott in the Center for Nutrition, Learning and Memory at Illinois, which was funded by Abbott.

Barbey is a professor in the Beckman Institute for Advanced Science and Technology and an affiliate of the Carl R. Woese Institute for Genomic Biology at the U. of I. He directs the Decision Neuroscience Laboratory and serves on the scientific advisory board of the Institute of Inflammation and Ageing at the University of Birmingham, U.K.

The study team also included Evan Anderson, of the Beckman Institute at the U. of I.; Jennifer Jurcsisn and Erica Johnson, of Wright-Patterson Air Force Base; and research fellow Matthew Kuchan, of Abbott Nutrition.

Editor’s notes:

To reach Aron Barbey or Christopher Zwilling, call 217-244-2551; email [email protected].

To reach Abbott scientists, call Kelli Nowinsky, 614-639-9160; email [email protected].

The paper “Enhanced physical and cognitive performance in active duty airmen: Evidence from a randomized multimodal physical fitness and nutritional intervention” is available from the U. of I. News Bureau.

Media Contact
Diana Yates, Life Sciences Editor, U. of I. News Bureau
[email protected]

Tags: Decision-making/Problem SolvingExerciseFood/Food ScienceIntelligenceMedicine/HealthMemory/Cognitive ProcessesNutrition/NutrientsSports/Recreation
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