Lusk Anne C, Mekary Rania A, Feskanich Diane, Willett Walter C
Department of Nutrition, Harvard School of Public Health, 655 Huntington Ave, Bldg II, Room 314, Boston, MA 02115, USA.
Arch Intern Med. 2010 Jun 28;170(12):1050-6. doi: 10.1001/archinternmed.2010.171.
To our knowledge, research has not been conducted on bicycle riding and weight control in comparison with walking. Our objective was to assess the association between bicycle riding and weight control in premenopausal women.
This was a 16-year follow-up study of 18,414 women in the Nurses' Health Study II. Weight change between 1989 and 2005 was the primary outcome, and the odds of gaining more than 5% of baseline body weight by 2005 was the secondary outcome.
At baseline, only 39% of participants walked briskly, while only 1.2% bicycled for more than 30 min/d. For a 30-min/d increase in activity between 1989 and 2005, weight gain was significantly less for brisk walking (-1.81 kg; 95% confidence interval [CI], -2.05 to -1.56 kg), bicycling (-1.59 kg; 95% CI, -2.09 to -1.08 kg), and other activities (-1.45 kg; 95% CI, -1.66 to -1.24 kg) but not for slow walking (+0.06 kg; 95% CI, -0.22 to 0.35 kg). Women who reported no bicycling in 1989 and increased to as little as 5 min/d in 2005 gained less weight (-0.74 kg; 95% CI, -1.41 to -0.07 kg; P value for trend, <.01) than those who remained nonbikers. Normal-weight women who bicycled more than 4 h/wk in 2005 had a lower odds of gaining more than 5% of their baseline body weight (odds ratio, 0.74; 95% CI, 0.56 to 0.98) compared with those who reported no bicycling; overweight and obese women had a lower odds at 2 to 3 h/wk (odds ratio, 0.54; 95% CI, 0.34 to 0.86).
Bicycling, similar to brisk walking, is associated with less weight gain and an inverse dose-response relationship exists, especially among overweight and obese women. Future research should focus on brisk walking and greater time spent bicycling.
据我们所知，尚未有关于骑自行车与步行相比对体重控制影响的研究。我们的目的是评估绝经前女性骑自行车与体重控制之间的关联。
这是一项对护士健康研究II中18414名女性进行的为期16年的随访研究。1989年至2005年期间的体重变化是主要结局，到2005年体重增加超过基线体重5%的几率是次要结局。
在基线时，只有39%的参与者进行轻快步行，而只有1.2%的人每天骑自行车超过30分钟。在1989年至2005年期间，每天活动增加30分钟，轻快步行（-1.81千克；95%置信区间[CI]，-2.05至-1.56千克）、骑自行车（-1.59千克；95%CI，-2.09至-1.08千克）和其他活动（-1.45千克；95%CI，-1.66至-1.24千克）导致的体重增加显著较少，但慢走（+0.06千克；95%CI，-0.22至0.35千克）并非如此。1989年报告不骑自行车且到2005年增加到每天仅5分钟的女性比那些仍不骑自行车的女性体重增加更少（-0.74千克；95%CI，-1.41至-0.07千克；趋势P值，<.01）。2005年每周骑自行车超过4小时的正常体重女性体重增加超过基线体重5%的几率较低（优势比，0.74；95%CI，0.56至0.98），而那些报告不骑自行车的女性；超重和肥胖女性在每周骑行2至3小时时几率较低（优势比，0.54；95%CI，0.34至0.86）。
骑自行车与轻快步行类似，与体重增加较少相关，且存在剂量反应反比关系，尤其是在超重和肥胖女性中。未来的研究应关注轻快步行和更长时间的骑自行车。
