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ココア摂取が高齢者におけるウォーミングアップの効果に及ぼす影響―プラセボ対照二重盲検クロスオーバー比較試験―
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JPY
Abstract
Background Exercise is essential for elderly people to extend their healthy life expectancy. Prior warm-up, as a means of preparing the body to be receptive to exercise, is linked to prevention of falls and injury. Objectives The aim of this study was to clarify whether ingestion of cocoa 30 minutes before a warm-up is useful for condition-building and maintaining the effects of warm-up. Methods Ten healthy elderly volunteers participated in the trial(average age, 67.5 years; 5men and 5 women). The study had a placebo-controlled, double︱blind, crossover, comparative design. The cocoa beverage was containing 30 mg of cacao flavanols. The placebo beverage was a cocoa-flavored drink with similar nutritional composition. Physical function of long seat body anteflexion, sublingual temperature, skin surface temperature of the facies posterior cruris and the dorsal region of the foot, grip, knee joint extension strength, plantar pressure distribution, and center of gravity fluctuation track length were evaluated. The statistical analysis consisted of a one-way analysis of variance (ANOVA)and multiple comparison. Differences were considered statistical significant when P<0.05. Results The measured value of long seat body anteflexion, sublingual temperature, skin surface temperature of the facies posterior cruris and the dorsal region of the foot, grip, and knee joint extension were significantly maintain higher in cocoa ingestion than that in placebo beverage. Forward transfers of weight were also significantly more maintained in plantar pressure distribution after cocoa ingestion than that in placebo beverage. Conclusion The ingestion of cocoa in elderly people before a warm-up was found to lead to a long-term maintenance of the effects of warm-up for the physical functions. The primary reason for these effects was suggested to be improved muscle function caused by increases in body temperature and surface temperature of the lower limbs due to improved blood circulation.
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