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Rappel sur l’échauffement de l’infra-épineux
Pour l’échauffement de l’infra-épineux, il faut échauffer comme ça sans trop étirer :
Je ne conseille pas d’étirer plus que ça (et encore quand on est bien chaud) :
La niacine protège lors des voyages en avion
High dietary niacin intake is associated with decreased chromosome translocation frequency in airline pilots
British Journal of Nutrition , 08 Oct 2010
Lee C. Yonga and Martin R. Petersen
Experimental studies suggest that B vitamins such as niacin, folate, riboflavin, vitamin B6 and vitamin B12 may protect against DNA damage induced by ionising radiation (IR). However, to date, data from IR-exposed human populations are not available. We examined the intakes of these B vitamins and their food sources in relation to the frequency of chromosome translocations as a biomarker of cumulative DNA damage, in eighty-two male airline pilots. Dietary intakes were estimated by using a self-administered semi-quantitative FFQ. Translocations in peripheral blood lymphocytes were scored by using fluorescence in situ hybridisation whole-chromosome painting. Negative binomial regression was used to estimate rate ratios and 95 % CI, adjusted for age and occupational and lifestyle factors. We observed a significant inverse association between translocation frequency and dietary intake of niacin (P = 0·02): adjusted rate ratio for subjects in the highest tertile compared with the lowest tertile was 0·58 (95 % CI 0·40, 0·83). Translocation frequency was not associated with total niacin intake from food and supplements as well as dietary or total intake of folate, riboflavin or vitamin B6 or B12. However, the adjusted rate ratios were significant for subjects with ≥ median compared with < median intake of whole grains (P = 0·03) and red and processed meat (P = 0·01): 0·69 (95 % CI 0·50, 0·96) and 1·56 (95 % CI 1·13, 2·16), respectively. Our data suggest that a high intake of niacin from food or a diet high in whole grains but low in red and processed meat may protect against cumulative DNA damage in IR-exposed persons.
La vitamine D contre les rides
Association of facial skin aging and vitamin D levels in middle-aged white women,
Chang AL, Tang JY, et al, Cancer Causes Control, 2010 Sep 30; [Epub ahead of print].
Summary: In a cross-sectional study involving 45 women aged more than 40 years, results indicate an inverse association between skin aging and serum vitamin D levels. Standardized digital facial images of the women were examined and serum 25(OH)D concentrations were measured. After adjusting for potential confounders, women with greater photodamage were associated with more than a 5-fold increased odds of being vitamin D insufficient. Additionally, erythema/telangiectasias, hyperpigmentation, and wrinkling were significantly associated with vitamin D insufficiency. Thus, the authors of this study conclude, “Our results suggest an association between skin aging and 25(OH)D levels.”
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