Doing more housework keeps stress levels higher at the end of the day for both married women and men , increases health risk ,the US researchers suggest .

美國研究人員發現，已婚男女下班后，家務做得越多，壓力就越高，健康風險也由此增加。

Researchers Darby Saxbe and Rena Graesch of the University of California and colleagues tracked 30 dual-earner couples around their homes for three days , using video cameras , interviews and surveys . They required the study participants to provide four saliva samples every day to measure the stress hormone cortisol , which is usually high in the morning—and during stressful situations – and tends to recover later in the day .

加利福尼亞大學研究員黛比.薩克斯比、熱那.格萊斯奇和同事一起用三天時間通過攝像機、采訪以及問卷調查了30對雙收入家庭。被調查者需每日提供四份唾液樣本以檢測他們的壓力激素皮質。該激素皮質水平在早晨和在壓力較大的情況下較高，然后會在一天內其他時間回落。

Saxbe says a steeper drop in the hormone is considered healthy . Cortisol levels can affect sleep , weight gain , burnout and weakened immune resistance .

薩克斯比稱如若該激素皮質水平在早晨以后的時間內迅速下降，便可斷定其主人是健康的。皮質水平可影響睡眠，體重的增長、倦怠及弱化了的免疫力。

On average , wives spent more of their time at home doing housework , followed by communication and leisure ,while husbands had more leisure time , followed by communication and housework .

一般而言，妻子會花更多的時間做家務，隨后進行社交或休閑活動，而丈夫有更多的休閑時間，其次是社交活動和家務勞動。

The study , published in the Journal of Family Psychology , found both wives and husbands who devoted more time to housework had higher levels of evening cortisol and weaker afternoon-to-evening recovery .

這份刊載于《家庭心理學》的研究發現，無論是妻子還是丈夫，只要花更多時間做家務，他們的皮質水平在晚間便會升高，下午到晚上精力恢復得也較慢。

However , husbands who apportioned more time to leisure , and whose wives apportioned less time to leisure , showed stronger after-work recovery , the study says .

然而，該研究還稱，那些自己休閑時間較多而妻子休閑時間較少的丈夫們，在工作后恢復得更快。

The findings suggest how the division of labor within couples is structured can implicate health , the researchers say .

研究人員稱這些發現揭示出，夫妻間勞動分工模式可影響健康。