healthbriefs
Caring for Others Prolongs Life R
Beetroot Juice Helps Older Brains Act Younger
B
eets contain high levels of dietary nitrate, which can
increase blood flow and improve exercise performance. Researchers from Wake Forest University, in Winston-Salem, North Carolina, tested the impact of consuming beetroot juice prior to exercise on the somatomotor cortex, the part of the brain that processes informa- tion from the muscles. Twenty-six older adults with
hypertension that generally don’t exercise were split into two groups. Half were given a beetroot juice supplement with 560 milligrams of nitrate prior to a thrice-weekly, 50-minute treadmill walk for six weeks. The other half were given a placebo with very little nitrate. The beetroot juice group showed sub- stantially higher levels of nitrate after exercising than the placebo group. “We knew going in that a number
of studies had shown that exercise has positive effects on the brain,” explains W. Jack Rejeski, director of the Behavioral Medicine Laboratory in the Health and Exercise Science Department at Wake Forest and study co-author. “We showed that compared to exercise alone, adding a beetroot juice supplement for hypertensive older adults to exer- cise resulted in brain connectivity that closely resembles what is seen in younger adults.”
esearchers from several international universities have found that seniors
that provide caregiving services live longer than those that do not. The scientists analyzed survival data and information collected from the Berlin Aging Study on 500 adults over the age of 69 from 1990 to 2009. They com- pared survival rates from the subjects that provided caregiving for children, grandchildren and friends to those that did not. Of the subjects analyzed, the half
that took care of their grandchildren or children were still alive 10 years after their first interview in 1990. Caring for non-family members also produced positive results, with half of the subjects living for seven years after the initial interview. Conversely, 50 percent of those that did not participate in any caregiving had died just four years after their first interview. The researchers warn that caregiving must be done in moderation. Ralph
Hertwig, director of the Center for Adaptive Rationality and the Max Planck Institute for Human Development, in Berlin, explains, “A moderate level of caregiving involvement seems to have positive effects on health, but previous studies have shown that more intense involvement causes stress, which has a negative effect on physical and mental health.
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