想减肥?素食比“低卡路里饮食”更有效!
2017/06/24
本月最新发表的一项研究证实,对节食者来说,吃素食不仅比采用传统的低卡路里饮食更有助于减肥,还能够通过降低肌肉脂肪来改善他们的代谢。


本月,发表在Journal of the American College of Nutrition 杂志上题为“The Effect of a Vegetarian vs Conventional Hypocaloric Diabetic Diet on Thigh Adipose Tissue Distribution in Subjects with Type 2 Diabetes: A Randomized Study”的一项研究证实,对节食者来说,吃素食不仅比采用传统的低卡路里饮食更有助于减肥,还能够通过降低肌肉脂肪来改善他们的代谢。

具体来说,参与该研究的74名2型糖尿病患者被随机分配到素食组或传统的抗糖尿病饮食组。素食组饮食包括蔬菜、谷物、豆类、水果和坚果,动物制品每天最多只能有1份低脂酸奶。传统的糖尿病饮食遵循欧洲糖尿病研究协会的官方建议。两组每天的热量限制都为500千卡,每个个体摄入的热量相同。

结果发现,素食组减肥的效果几乎是传统抗糖尿病饮食组的两倍。素食组参与者平均减掉6.2kg,传统抗糖尿病饮食组参与者平均减掉3.2kg。

此外,利用磁共振成像技术,研究人员观察了不同饮食对参与者皮下、筋膜(subfascial)和肌肉内脂肪的影响。结果发现,两种饮食对皮下脂肪的减少作用是相似的。然而,只有在素食组筋膜脂肪才会降低。此外,素食组参与者肌肉脂肪大大减少。

由于2型糖尿病患者筋膜脂肪的增加与胰岛素抵抗有关,因此减少这类脂肪可能有益于葡萄糖代谢。此外,减少肌肉脂肪能够帮助改善肌肉力量和灵活性,特别是对于那些患有糖尿病的老年人。

该研究的第一作者兼通讯作者Hana Kahleová博士说:“素食被证明是最有效的减肥饮食。我们的研究也证明了素食对减少肌肉脂肪更有效。降低肌肉脂肪改善了葡萄糖和脂质代谢。因此,这一发现对代谢综合症和2型糖尿病患者来说尤为重要。同时,它也与想要保持苗条和健康的人有关。”

参考资料:

Vegetarian diets almost twice as effective in reducing body weight, study finds

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  • The Effect of a Vegetarian vs Conventional Hypocaloric Diabetic Diet on Thigh Adipose Tissue Distribution in Subjects with Type 2 Diabetes: A Randomized Study

    Objective: The aim of our study was to compare the effects of a vegetarian and a conventional diet on thigh adipose tissue distribution in subjects with type 2 diabetes (T2D). Methods: Seventy-four subjects with T2D were randomly assigned to either follow a vegetarian diet (V, n = 37) or a control group who followed an isocaloric conventional anti-diabetic diet (C, n = 37). Both diets were calorie restricted (−500 kcal/day). To measure insulin sensitivity, the hyperinsulinemic (1 mU.kg−1.min−1) isoglycemic clamp was conducted. β-Cell function was assessed using a mathematical model after a test meal. Magnetic resonance imaging of the thigh was performed. All subjects were examined at 0, 3, and 6 months. Statistical analyses were performed using repeated measures analysis of variance and a multivariate regression model. Results: Greater reduction was observed in total leg area in V (−13.6 cm2 [95% confidence interval [CI], −14.2 to −12.9] in V vs −9.9 cm2 [95% CI, −10.6 to −9.2] in C; Gxt p < 0.001). The reduction in subcutaneous fat was comparable in response to both diets (Gxt, p = 0.64). Subfascial fat was reduced only in response to a vegetarian diet (−0.82 [95% CI, −1.13 to −0.55] cm2 in V vs −0.44 [95% CI, −0.78 to +0.02] cm2 in C; Gxt, p = 0.04). The reduction in intramuscular fat tended to be greater in response to a vegetarian diet (−1.78 [95% CI, −2.26 to −1.27] cm2 in V vs −0.57 [95% CI, −1.06 to −0.09] cm2 in C; Gxt, p = 0.12). Changes in subcutaneous and subfascial fat correlated with changes in glycated hemoglobin (HbA1c), fasting plasma glucose, and β-cell insulin sensitivity. After adjustment for changes in body mass index (BMI), correlations remained significant for changes in fasting plasma glucose and β-cell insulin sensitivity and with changes in triglycerides.

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