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Matti Narkia

Eat Fruits And Vegetable For Better Vision - 0 views

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    "Carotenoids, found in green leafy vegetables and colored fruits, have been found to increase visual performance and may prevent age-related eye diseases, according to a study in the Journal of Food Science, published by the Institute of Food Technologists. Authors from the University of Georgia compiled the results of multiple studies on the effects of the carotenoids lutein and zeaxanthin on visual performance. These carotenoids play an important role in human vision, including a positive impact on the retina.

    After reviewing the various studies, the authors concluded that rmacular pigments, such as lutein and zeaxanthin do have an effect on visual performance. Lutein and zeaxanthin can reduce disability and discomfort from glare, enhance contrast, and reduce photostress recovery times. They can also reduce glare from light absorption and increase the visual range.

    Lead author Dr. Billy R. Hammond Jr. noted that the research of the effects of lutein and zeazanthin are important because "it is clear that they could potentially improve vision through biological means. For example, a study conducted in 2008 suggests that the pigments protect the retina and lens and perhaps even help prevent age-related eye diseases such as macular degeneration and cataract"
Matti Narkia

Athletic Performance and Vitamin D : Medicine & Science in Sports & Exercise - 0 views

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    Athletic performance and vitamin D.
    Cannell JJ, Hollis BW, Sorenson MB, Taft TN, Anderson JJ.
    Med Sci Sports Exerc. 2009 May;41(5):1102-10. Review.
    PMID: 19346976
    doi: 10.1249/MSS.0b013e3181930c2b

    Conclusions: Vitamin D may improve athletic performance in vitamin D-deficient athletes. Peak athletic performance may occur when 25(OH)D levels approach those obtained by natural, full-body, summer sun exposure, which is at least 50 ng·mL-1. Such 25(OH)D levels may also protect the athlete from several acute and chronic medical conditions.
Matti Narkia

Ketogenic diets and physical performance - Nutrition & Metabolism | Full text - 0 views

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    Ketogenic diets and physical performance.
    Phinney SD.
    Nutr Metab (Lond). 2004 Aug 17;1(1):2.
    PMID: 15507148
    doi:10.1186/1743-7075-1-2

    Impaired physical performance is a common but not obligate result of a low carbohydrate diet. Lessons from traditional Inuit culture indicate that time for adaptation, optimized sodium and potassium nutriture, and constraint of protein to 15-25 % of daily energy expenditure allow unimpaired endurance performance despite nutritional ketosis.

    Both observational and prospectively designed studies support the conclusion that submaximal endurance performance can be sustained despite the virtual exclusion of carbohydrate from the human diet. Clearly this result does not automatically follow the casual implementation of dietary carbohydrate restriction, however, as careful attention to time for keto-adaptation, mineral nutriture, and constraint of the daily protein dose is required. Contradictory results in the scientific literature can be explained by the lack of attention to these lessons learned (and for the most part now forgotten) by the cultures that traditionally lived by hunting. Therapeutic use of ketogenic diets should not require constraint of most forms of physical labor or recreational activity, with the one caveat that anaerobic (ie, weight lifting or sprint) performance is limited by the low muscle glycogen levels induced by a ketogenic diet, and this would strongly discourage its use under most conditions of competitive athletics.
Matti Narkia

Association between 25-hydroxyvitamin D levels and cognitive performance in middle-aged... - 0 views

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    Association between 25-hydroxyvitamin D levels and cognitive performance in middle-aged and older European men.
    Lee DM, Tajar A, Ulubaev A, Pendleton N, O'Neill TW, O'Connor DB, Bartfai G, Boonen S, Bouillon R, Casanueva FF, Finn JD, Forti G, Giwercman A, Han TS, Huhtaniemi IT, Kula K, Lean ME, Punab M, Silman AJ, Vanderschueren D, Wu FC; EMAS study group.
    J Neurol Neurosurg Psychiatry. 2009 Jul;80(7):722-9. Epub 2009 May 21.
    PMID: 19460797
    doi:10.1136/jnnp.2008.165720

    Conclusion: In this study, lower 25(OH)D levels were associated with poorer performance on the DSST. Further research is warranted to determine whether vitamin D sufficiency might have a role in preserving cognitive function in older adults.
Matti Narkia

Vitamin D deficiency is associated with worse cognitive performance and lower bone dens... - 0 views

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    Vitamin D deficiency is associated with worse cognitive performance and lower bone density in older African Americans.
    Wilkins CH, Birge SJ, Sheline YI, Morris JC.
    J Natl Med Assoc. 2009 Apr;101(4):349-54.
    PMID: 19397226

    CONCLUSIONS: Vitamin D deficiency in older African Americans was associated with worse cognitive performance and lower BMD of the hip
Matti Narkia

Effects of vitamin D supplementation on strength, physical performance, and falls in ol... - 0 views

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    Effects of vitamin D supplementation on strength, physical performance, and falls in older persons: a systematic review.
    Latham NK, Anderson CS, Reid IR.
    J Am Geriatr Soc. 2003 Sep;51(9):1219-26. Review.
    PMID: 12919233
    DOI: 10.1046/j.1532-5415.2003.51405.

    Conclusion: Although there is insufficient evidence that vitamin D supplementation alone improves physical performance in older people, some data suggest a benefit from vitamin D combined with calcium supplementation, but this requires confirmation in large, well-designed trials.
Matti Narkia

Vitamin D and cognitive performance in adults: a systematic review. - Eur J Neurol. 200... - 0 views

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    Vitamin D and cognitive performance in adults: a systematic review.
    Annweiler C, Allali G, Allain P, Bridenbaugh S, Schott AM, Kressig RW, Beauchet O.
    Eur J Neurol. 2009 Oct;16(10):1083-9. Epub 2009 Jul 29.
    PMID: 19659751
    DOI: 10.1111/j.1468-1331.2009.02755.x

    This systematic review shows that the association between serum 25OHD concentrations and cognitive performance is not yet clearly established. The inconclusive results of the reviewed studies could be due to methodology, types of the cognitive tasks used and/or the cellular mechanisms of vitamin D.
Matti Narkia

Vitamin D-Related Changes in Physical Performance: A Systematic Review. - [J Nutr Healt... - 0 views

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    Vitamin D-Related Changes in Physical Performance: A Systematic Review.
    Annweiler C, Schott AM, Berrut G, Fantino B, Beauchet O.
    J Nutr Health Aging. 2009;13(10):893-898.
    PMID: 19924350

    Conclusions: The findings show that the association between vitamin D and physical performance remains controversial. Observational studies and clinical trials yielded divergent results, which highlights the complex and to date still poorly understood association between serum vitamin D concentration or vitamin D supplementation and physical performance.
Matti Narkia

TMUSCLE.com | "D" is for Doping - 0 views

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    "In 1927 a controversy arose in the athletic world.

    The German Swimmers' Association had decided to use a sunlamp on their athletes to boost performance. Some felt this ultraviolet irradiation constituted "athletic unfairness."

    In other words, doping."
Matti Narkia

Maternal Licorice Consumption and Detrimental Cognitive and Psychiatric Outco... - 0 views

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    Katri Räikkönen, Anu-Katriina Pesonen, Kati Heinonen, Jari Lahti, Niina Komsi, Johan G. Eriksson, Jonathan R. Seckl, Anna-Liisa Järvenpää, and Timo E. Strandberg
    Maternal Licorice Consumption and Detrimental Cognitive and Psychiatric Outcomes in Children
    American Journal of Epidemiology Advance Access published on October 4, 2009.
    doi:10.1093/aje/kwp272

    Data are compatible with adverse fetal "programming" by overexposure to glucocorticoids and caution against excessive intake of licorice-containing foodstuffs during pregnancy.
Matti Narkia

Sunlight, vitamin D, sexual performance and fertility, Vitamin D Deficiency - 0 views

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    In 1939, Dr. Abraham Myerson measured initial levels of circulating testosterone in men and exposed their various body parts to UVB light.

    After five days of chest exposure sufficient to cause reddening, circulating testosterone increased by 120%. After eight days without additional UV exposure, testosterone returned to initial levels. When the genital area was exposed, testosterone levels increased by 200%!
Matti Narkia

Vitamin D Status Predicts Physical Performance and Its Decline in Older Persons -- Wich... - 0 views

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    Vitamin D status predicts physical performance and its decline in older persons.
    Wicherts IS, van Schoor NM, Boeke AJ, Visser M, Deeg DJ, Smit J, Knol DL, Lips P.
    J Clin Endocrinol Metab. 2007 Jun;92(6):2058-65. Epub 2007 Mar 6.
    PMID: 17341569
    doi:10.1210/jc.2006-1525

    ONCLUSIONS: Serum 25-OHD concentrations below 20 ng/ml are associated with poorer physical performance and a greater decline in physical performance in older men and women. Because almost 50% of the population had serum 25-OHD below 20 ng/ml, public health strategies should be aimed at this group.
Matti Narkia

Low vitamin D levels may impair thinking | Health | Reuters - 0 views

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    NEW YORK (Reuters Health) - New research suggests that low vitamin D levels in the body are associated with thinking or "cognitive" impairments in older men, but whether vitamin D supplements can help is not yet known.

    In the study, an investigation of European men, subjects with low levels of vitamin D scored worse on a standard test of cognitive ability than did their peers with normal levels, Dr. David M. Lee, from the University of Manchester, UK, and co-researchers found. Although, the authors emphasize, the difference in scores was not that great.
Matti Narkia

Chocolate Drink Could Help You Do The Math - 0 views

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    Foods rich in cocoa may improve performance on challenging mental tasks like arithmetic. This is the finding of a study presented as part of a symposium highlighting the potential of plant-based treatments presented at the British Psychological Society Annual Conference 2009 in Brighton.

    Crystal Haskell from the Brain, Performance and Nutrition Research Centre at Northumbria University said: "Foods containing high levels of cocoa flavanols, found in chocolate, have been shown to increase cerebral blood flow, and it has also been proven that consumption of plants that have these properties improves performance on mentally demanding tasks. We wanted to discover whether cocoa flavanols produced the same effect.
Matti Narkia

Association between vitamin D status and physical performance: the InCHIANTI study. - J... - 0 views

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    Association between vitamin D status and physical performance: the InCHIANTI study.\nHouston DK, Cesari M, Ferrucci L, Cherubini A, Maggio D, Bartali B, Johnson MA, Schwartz GG, Kritchevsky SB.\nJ Gerontol A Biol Sci Med Sci. 2007 Apr;62(4):440-6.\nPMID: 17452740
Matti Narkia

Vitamin D Status Predicts Physical Performance and Its Decline in Older Persons -- Wich... - 0 views

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    Wicherts IS, van Schoor NM, Boeke AJ, Visser M, Deeg DJ, Smit J, Knol DL, Lips P.
    Vitamin D status predicts physical performance and its decline in older persons.
    J Clin Endocrinol Metab. 2007 Jun;92(6):2058-65. Epub 2007 Mar 6.
    PMID: 17341569 [PubMed
Matti Narkia

Association Between Vitamin D Status and Physical Performance: The InCHIANTI Study -- H... - 0 views

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    Houston DK, Cesari M, Ferrucci L, Cherubini A, Maggio D, Bartali B, Johnson MA, Schwartz GG, Kritchevsky SB.
    Association between vitamin D status and physical performance: the InCHIANTI study.
    J Gerontol A Biol Sci Med Sci. 2007 Apr;62(4):440-6.
    PMID:
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