Monday, December 20, 2010

Beetroot juice could give the elderly a new lease of life, say "experts"

It does appear that nitrates in beetroot juice induce temporary vasodilation but lots of things do that -- including alcohol. I know which one I would rather drink

Drinking beetroot juice could help the elderly lead more active lives, it has been found. In tests, they required less energy to carry out low-intensity exercises after drinking the juice. The amount of effort it took to walk was reduced by 12 per cent. This could enhance their lives by allowing the elderly to carry out tasks they might not otherwise attempt, the researchers said.

Beetroot juice widens blood vessels and reduces the amount of oxygen needed by muscles during activity. As people age, or if they develop conditions that affect the cardiovascular system, the amount of oxygen taken in during exercise can drop dramatically.

Writing in the Journal of Applied Physiology, Katie Lansley said: ‘What we’ve seen in this study is that beetroot juice can actually reduce the amount of oxygen you need to perform even low-intensity exercise.’

A team from Exeter University and the Peninsula College of Medicine and Dentistry gave subjects normal beetroot juice or juice with the nitrates removed. Professor Andy Jones said: ‘Each time the normal, nitrate-rich juice was used, we saw a marked improvement in performance which wasn’t there with the filtered juice – so we know the nitrate is the active ingredient.


Breastfeeding 'could make boys more intelligent'

This is an old one and again it is epidemiological speculation. More intelligent mothers are more likely to be conscientious about breastfeeding (We read: "The mother's IQ was more highly predictive of breastfeeding status than were her race, education, age, poverty status, smoking, the home environment, or the child's birth weight or birth order") and such women would also have more intelligent sons. Why the effect was observed in boys only on this occasion also has to be speculative. Note that other studies such as the one linked above have found NO effect when IQ and other confounders are controlled for. One does rather wonder why this old ground is being replowed

Breastfeeding your baby could help them achieve academic success by the age of 10, a study has found. Researchers found that children who were predominantly breastfed for six months did better in mathematics, reading, writing and spelling. The effect was strongest in boys.

It is thought that the bonding between mother and baby fostered during breastfeeding may mean mothers are more attentive and supportive of their children. Boys are more responsive to maternal attention when learning which could explain why breastfeeding had a greater effect on them, the researchers said.

The authors, from University of Western Australia, also suggested that there may be substances in breastmilk that help the brain develop. This effect may be more pronounced in boys because they lack the female hormones which are known to protect the brain.

Women in Britain are recommended to exclusively breastfeed for six months but many drop it within the first month saying they lacked support when they had difficulties.

The study, published in the journal Pediatrics, said: "By looking at boys and girls independently, we found that predominant breastfeeding for six months or longer was significantly associated with increased mathematics, reading, writing, and spelling scores for boys, but no effect of breastfeeding was apparent on the educational attainment of girls for any subject. "We found significant interactions for mathematics and spelling revealing that boys were more likely than girls to have improved academic scores if they were breastfed for a longer period. "On average, boys had poorer numeracy and literacy scores than girls; however, the scores were improved if the child was breastfed for six months or longer."

Just over 1,000 children were involved in the study and were followed from when their mothers were 18 weeks pregnant until they reached ten years of age when they were assessed using standard mathematics, reading, writing and spelling scores.

The authors adjusted for other factors that could influence educational attainment, including mother's education and household income. However they could not fully account for mother's intelligence.

Lead author Dr Wendy Oddy, from the Centre for Child Health Research at University of Western Australia, in Perth, wrote in the journal: "The positive effect of predominant breastfeeding for six months or longer on academic achievement can be viewed as shifting the mean population score upward, particularly for boys. "Our study adds to growing evidence that breastfeeding for at least six months has beneficial effects on optimal child development. Mothers should be encouraged to breastfeed for six months and beyond."

Cathy Warwick, general secretary of the Royal College of Midwives, said: "This is a difficult area to research because of the need to allow for all of the possible variables that influence educational attainment. "However this study has controlled for these as far as possible and adds to the growing body of evidence that breast feeding is the best way to feed babies from birth to six months of age and beyond.

"It is vital that in the light of this evidence women and their families are given the highest quality of information antenatally and excellent support to breast feed postnatally. It is worrying that recent reviews of the support women are getting suggest that this is one aspect of maternity services where resources are lacking and care provision needs to improve."


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