Duval Karine, Strychar Irene, Cyr Marie-Josée, Prud'homme Denis, Rabasa-Lhoret Rémi, Doucet Eric
Institute of Population Health, University of Ottawa, Ottawa, Canada.
Am J Clin Nutr. 2008 Nov;88(5):1200-5. doi: 10.3945/ajcn.2008.26220.
It has been shown that eating frequency (EF) is related to body composition in women, but the results are inconclusive. These inconsistent findings could be due to the influence of additional factors such as physical activity.
We aimed to investigate the relation between EF and body composition in premenopausal women and to explore the effect of physical activity energy expenditure (PAEE) and physical fitness on that association.
Eighty-five premenopausal women [x +/- SD age: 49.9 +/- 2.0 y; body mass index (in kg/m(2)): 23.2 +/- 2.2] were studied at the onset of a prospective observational study. Seven-day food diaries were used to measure energy intake and EF. Body composition (measured with dual-energy X-ray absorptiometry), physical fitness (measured by the peak oxygen consumption), and PAEE (measured by using an accelerometer) were also measured.
Mean EF was 4.6 +/- 0.9 eating occasions/d. A significant positive correlation was found between EF and energy intake (r = 0.31, P < 0.01). Moreover, EF was negatively correlated with body mass index (r = -0.25, P < 0.05), waist circumference (r = -0.32, P < 0.01), percentage body fat (r = -0.26, P < 0.05), and fat mass (r = -0.27, P < 0.05). The associations between adiposity and EF were no longer significant after correction for PAEE and peak oxygen consumption.
The relation between EF and body composition could be mediated by PAEE and physical fitness.
已有研究表明，进食频率（EF）与女性身体成分有关，但结果尚无定论。这些不一致的发现可能是由于身体活动等其他因素的影响。
我们旨在研究绝经前女性的进食频率与身体成分之间的关系，并探讨身体活动能量消耗（PAEE）和身体素质对这种关联的影响。
在一项前瞻性观察性研究开始时，对85名绝经前女性[x±标准差年龄：49.9±2.0岁；体重指数（kg/m²）：23.2±2.2]进行了研究。使用7天食物日记来测量能量摄入和进食频率。还测量了身体成分（采用双能X线吸收法测量）、身体素质（通过峰值耗氧量测量）和身体活动能量消耗（使用加速度计测量）。
平均进食频率为4.6±0.9次/天。进食频率与能量摄入之间存在显著正相关（r = 0.31，P < 0.01）。此外，进食频率与体重指数（r = -0.25，P < 0.05）、腰围（r = -0.32，P < 0.01）、体脂百分比（r = -0.26，P < 0.05）和脂肪量（r = -0.27，P < 0.05）呈负相关。在校正身体活动能量消耗和峰值耗氧量后，肥胖与进食频率之间的关联不再显著。
进食频率与身体成分之间的关系可能由身体活动能量消耗和身体素质介导。
