即使是中度日常活動也可以降低婦女死亡風險


  【24drs.com】根據11月2日線上發表於美國預防醫學期刊的一篇研究,即使是一天內的合理輕度活動量,也與婦女的任何原因死亡風險降低有關。男性可以從依照建議的中度到重度運動(moderate to vigorous physical activity,MVPA)中降低風險,但是不能單靠輕度活動。
  
  這些發現來自客觀測量的活動程度,而這通常比常用的自我報告更可靠,因為自我報告受到回憶偏差和社會期望偏差的影響。
  
  加拿大安大略Kingston皇后大學Ian Janssen博士以及Emily Borgundvaag寫道,相較於只有適量運動者,運動量少或沒有MVPA者的死亡率風險有差異;相較於做許多運動者,有適量MVPA者之風險小或者沒有差異。
  
  他們寫道,從行為改變的角度來看,MVPA和死亡率風險的劑量反應模式是鼓舞人心的,給不運動成年人的建議不是需要去跑馬拉松,而是只要做一點點MVPA。
  
  研究人員使用Actigraph加速度計測量5,562名成年人的運動,測量期間4-7天,這5千多名成年人參加了2003-2006年的美國國家健康與營養調查研究,研究開始時的平均年齡為48.4歲,之後追蹤平均6.7年。
  
  研究者依據每日輕度身體活動量(LPA)及MVPA量將參與者分成5組,他們將第一個五分之一定義為低參與組—包括每天10.0 - 157.0分鐘的LPA到最多每天3.1分鐘的MVPA;中度到高度的五分之一的活動量範圍為每天157.1 - 423.4分鐘的LPA以及每天3.2 - 343.8分鐘的MVPA。
  
  校正年齡、性別、種族、社經狀態、飲食、抽菸、飲酒等因素之後,他們發現,相較於低參與組,中度到高度LPA的女性死於任何原因的風險降低42%(風險比[HR]為0.58; 95%信賴區間[CI]為0.38 - 0.88)。
  
  此外,中度到高度的五分之一中,中度到強度運動之女性的所有原因死亡率風險降低66%(HR, 0.34; 95% CI, 0.20 - 0.57)。
  
  研究者接著比較了不同運動程度的婦女,以及只有低度LPA 和低度MVPA的婦女,他們發現,即便只是增加中度的MVPA量也可增添最大效益:如果他們是LPA最低五分之一組者,死亡率降低84% (HR, 0.16; 95% CI, 0.07 - 0.34) ,如果他們是中度到高度的LPA,則是降低83%(HR, 0.17; 95% CI, 0.09 - 0.36)。
  
  然而,即使是低度MVPA的婦女,如果他們的LPA程度為中度到高度,其死亡率風險降低58% (HR, 0.42; 95% CI, 0.26 - 0.70)。
  
  同時,男性在所有原因死亡率與LPA之間並無統計上的顯著差異(HR, 1.02; 95% CI, 0.64 - 1.61),他們也指出,在中度到高度的五分之一,MVPA降低61%的各種原因死亡率(HR, 0.39; 95% CI, 0.27 - 0.56),但是,低度MVPA者並未從高度LPA中獲得降低死亡率風險的效益。
  
  作者們寫道,在本研究中,第二個五分之一的MVPA者累計有每週23-69分鐘的MVPA,並非全部都符合標準,大多數是中度活動。85%的MVPA是零星累積的(例如:在這裡、在那裡各幾分鐘),而不是至少10分鐘時間的MVPA。
  
  資料來源:http://www.24drs.com/
  
  Native link:Even Modest Daily Activity May Reduce Mortality Risk for Women

Even Modest Daily Activity May Reduce Mortality Risk for Women

By Tara Haelle
Medscape Medical News

Even a reasonable amount of light physical activity spread throughout the day is linked to a reduction in women's risk for death from any cause, according to a study published online November 2 in the American Journal of Preventive Medicine. Men had a reduced risk from moderate to vigorous physical activity (MVPA), as recommended daily, but not from light physical activity alone.

These findings come from objectively measured activity levels that are generally more reliable than commonly used self-reporting, which is subject to recall bias and social desirability bias.

"[A]lthough mortality risk differs in those who do little or no MVPA versus those who did only a modest amount, there is little or no difference in risk in those who do a modest amount of MVPA versus those who do a lot," write Emily Borgundvaag, MSc, and Ian Janssen, PhD, from Queen's University in Kingston, Ontario, Canada.

"The dose–response pattern between MVPA and mortality risk is encouraging from a behavior change standpoint," they write. "The message for inactive adults does not need to be to run a marathon, but rather to just do a little bit of MVPA."

The researchers used Actigraph accelerometers to measure the physical activity of 5562 adults, over the course of 4 to 7 days. The adults, who were participants in the 2003 to 2006 National Health and Nutrition Examination Survey and had an average baseline age of 48.4 years, were then tracked for a mean 6.7 years.

The investigators stratified participants into quintiles on the basis of their amount of daily light physical activity (LPA) and their amount of MVPA. They designated the first quintile as low participation, which included 10.0 to 157.0 minutes daily of LPA and up to 3.1 minutes daily of MVPA. Modest to high quintiles of activity ranged from 157.1 to 423.4 minutes per day for LPA and 3.2 to 343.8 minutes daily of MVPA.

After adjusting for age, sex, race, socioeconomic status, diet, smoking, and alcohol consumption, they found that women with modest to high levels of LPA were 42% less likely to die from any cause (hazard ratio [HR], 0.58; 95% confidence interval [CI], 0.38 - 0.88) than those in the low participation group.

In addition, women with moderate to vigorous physical activity in the modest to high quintiles had a 66% lower risk for all-cause mortality (HR, 0.34; 95% CI, 0.20 - 0.57).

The researchers then compared women with different combinations of activity levels with women with only low LPA and low MVPA. They found that adding even a modest amount of MVPA added the greatest benefit: an 84% (HR, 0.16; 95% CI, 0.07 - 0.34) reduction in mortality if they were in the lowest quintile for LPA and 83% reduction if they had modest to high levels of LPA (HR, 0.17; 95% CI, 0.09 - 0.36).

Yet even women with low levels of MVPA had a 58% lower risk for mortality if their LPA levels were modest to high (HR, 0.42; 95% CI, 0.26 - 0.70).

Men, meanwhile, did not have a statistically significant difference in all-cause mortality with LPA (HR, 1.02; 95% CI, 0.64 - 1.61). They did show a 61% (HR, 0.39; 95% CI, 0.27 - 0.56) decreased likelihood of all-cause mortality with MVPA in the modest to high quintiles, but those with low levels of MVPA did not gain any reduction in mortality risk with high levels of LPA.

"In the present study, participants in the second MVPA quintile accumulated 23–69 minutes/week of MVPA, a modest amount of activity by most if not all standards," the authors write. "Eighty-five percent of this MVPA was accumulated sporadically (e.g., a couple of minutes here and there) and not in bouts of MVPA that were at least 10 minutes long."

The research was funded by a Canada Research Chair award. The authors have disclosed no relevant financial relationships.

Am J Prev Med. Published online November 2, 2016.

    
相關報導
荷爾蒙替代療法與肺癌死亡風險有關
2009/10/8 上午 10:02:00
病症嚴重度及死亡風險是轉至安寧照護的預測因子
2005/2/3 下午 01:36:00

上一頁
   1  
下一頁




回上一頁