加拿大科學(xué)家日前在最新一期美國《內(nèi)科學(xué)文獻(xiàn)》（Archives of Internal Medicine）月刊上發(fā)表研究報(bào)告指出，慢節(jié)奏活動(dòng)有助于減緩認(rèn)知障礙的出現(xiàn),。
研究人員對一組老年人的能量消耗和認(rèn)知活動(dòng)進(jìn)行了2至5年的跟蹤研究。其中大部分志愿者都不鍛煉,，幾乎沒有人從事對體力要求較為嚴(yán)格的活動(dòng)。他們主要是進(jìn)行漫步,、做飯、整理花園,、打掃衛(wèi)生以及類似的活動(dòng)。
研究項(xiàng)目負(fù)責(zé)人之一,、加拿大滑鐵盧大學(xué)教授勞拉·米德爾頓指出，研究發(fā)現(xiàn),，這些活動(dòng)對大腦的影響是驚人的。久坐不動(dòng)的志愿者在每年的認(rèn)知能力測試中獲得的分?jǐn)?shù)日益下降,；活動(dòng)較為積極的人群認(rèn)知能力受損情況較輕,；而每天消耗能量較多的人當(dāng)中，90%能夠保持多年不變的記憶能力,。
米德爾頓說：“我們的研究結(jié)果表明,，要想保護(hù)大腦,，不必進(jìn)行劇烈的運(yùn)動(dòng)。”
《內(nèi)科學(xué)文獻(xiàn)》刊登的另一篇研究報(bào)告也指出,，在5年的時(shí)間內(nèi),，每天對一組患有心血管疾病或有患病風(fēng)險(xiǎn)的70歲婦女進(jìn)行認(rèn)知能力測試結(jié)果顯示,，其中最活躍的志愿者選擇的鍛煉方式也不過是散步,，這使她們的認(rèn)知能力受損的速度有所減緩,，盡管記憶力仍在減退，但速度要慢于久坐不動(dòng)的人,。(生物谷 Bioon.com)
doi:10.1001/archinternmed.2011.277
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PMID:
Activity Energy Expenditure and Incident Cognitive Impairment in Older Adults
Laura E. Middleton, PhD; Todd M. Manini, PhD; Eleanor M. Simonsick, PhD; Tamara B. Harris, MD, MS; Deborah E. Barnes, PhD; Frances Tylavsky, DrPH; Jennifer S. Brach, PhD, PT; James E. Everhart, MD, MPH; Kristine Yaffe, MD
Studies suggest that physically active people have reduced risk of incident cognitive impairment in late life. However, these studies are limited by reliance on self-reports of physical activity, which only moderately correlate with objective measures and often exclude activity not readily quantifiable by frequency and duration. The objective of this study was to investigate the relationship between activity energy expenditure (AEE), an objective measure of total activity, and incidence of cognitive impairment. After adjustment for baseline Modified Mini-Mental State Examination scores, demographics, fat-free mass, sleep duration, self-reported health, and diabetes mellitus, older adults in the highest sex-specific tertile of AEE had lower odds of incident cognitive impairment than those in the lowest tertile (odds ratio, 0.09; 95% confidence interval, 0.01-0.79). There was also a significant dose response between AEE and incidence of cognitive impairment (P = .05 for trend over tertiles). These findings indicate that greater AEE may be protective against cognitive impairment in a dose-response manner. The significance of overall activity in contrast to vigorous or light activity should be determined.
