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    ウォーター・ダイエット

    このエントリーを含むはてなブックマーク はてなブックマーク - ウォーター・ダイエット あとで読む
    ダイエットで、食前に水を飲む方法が紹介されていた。

    食事の前に水を飲むダイエットは本当に効果がある(特に35歳以上) : ライフハッカー[日本版]

    食事をする前に水を飲むと食べ過ぎを防止できる」と言われると、確かにそれはそうかもしれないけど、どうにも続きそうにないダイエット方法のような気が...。ところが、ニューヨークタイムズのWebサイトに、水分摂取と体重やカロリーコントロールについて研究した論文が、いくつか載っていました。

    その中のある研究では、体重を減らすためにカロリー制限をしている55歳以上のグループで、食事の前にコップ2杯の水を飲んでいた人たちは、水を飲まなかった人たちよりも、明らかに体重が減っていたそうです。



    とても簡単な方法だ。
    食事の前に、水を飲むだけ。

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    Does Drinking Water Before Meals Aid Weight Loss? - NYTimes.com

    By ANAHAD O’CONNOR
    Published: November 15, 2010

    THE FACTS Late November marks the start of the gluttonous holiday season. But a simple step might help keep food intake in check: a glass of water before meals.

    Dieters have been encouraged to employ this trick for ages, with the reasoning quite simple: the water fills the stomach, thus reducing hunger. But only in recent years have studies borne this out.

    In the most recent, a randomized trial published in the journal Obesity in February, scientists at Virginia Tech followed a group of overweight subjects age 55 and up on low-calorie diets for about three months. Half the people were told to drink two cups of water before every meal. At the end of the study, the water group had lost an average of 15.5 pounds, compared with 11 pounds in the other group.

    A 2008 study showed a similar effect, finding a 13 percent reduction in calorie intake in overweight subjects who consumed water before breakfast. But a third study, this one in 2007, had a peculiar finding: drinking water 30 minutes before a meal reduced calorie intake and feelings of hunger in older adults, but had little effect on subjects under 35. It’s not clear why, but the researchers pointed out that because older adults are at increased risk of being overweight and obese, further studies should determine whether this is effective for the aging population.

    Studies show the average person gains about a pound between Thanksgiving and January. Most adults gain one to two pounds a year over a lifetime, so staving off the holiday pound can go a long way.

    THE BOTTOM LINE Drinking water before a meal can reduce calorie intake, though the effect seems most prominent in older people.

    ANAHAD O’CONNOR
    scitimes@nytimes.com



    Water consumption increases weight loss during a hypocaloric diet intervention in middle-aged and older adults. [Obesity (Silver Spring). 2010] - PubMed

    Obesity (Silver Spring). 2010 Feb;18(2):300-7. Epub 2009 Aug 6.

    Water consumption increases weight loss during a hypocaloric diet intervention in middle-aged and older adults.
    Dennis EA, Dengo AL, Comber DL, Flack KD, Savla J, Davy KP, Davy BM.
    Department of Human Nutrition, Foods and Exercise, Virginia Tech, Blacksburg, Virginia, USA.

    Abstract
    Water consumption acutely reduces meal energy intake (EI) among middle-aged and older adults. Our objectives were to determine if premeal water consumption facilitates weight loss among overweight/obese middle-aged and older adults, and to determine if the ability of premeal water consumption to reduce meal EI is sustained after a 12-week period of increased water consumption. Adults (n = 48; 55-75 years, BMI 25-40 kg/m(2)) were assigned to one of two groups: (i) hypocaloric diet + 500 ml water prior to each daily meal (water group), or (ii) hypocaloric diet alone (nonwater group). At baseline and week 12, each participant underwent two ad libitum test meals: (i) no preload (NP), and (ii) 500 ml water preload (WP). Meal EI was assessed at each test meal and body weight was assessed weekly for 12 weeks. Weight loss was ~2 kg greater in the water group than in the nonwater group, and the water group (beta = -0.87, P < 0.001) showed a 44% greater decline in weight over the 12 weeks than the nonwater group (beta = -0.60, P < 0.001). Test meal EI was lower in the WP than NP condition at baseline, but not at week 12 (baseline: WP 498 +/- 25 kcal, NP 541 +/- 27 kcal, P = 0.009; 12-week: WP 480 +/- 25 kcal, NP 506 +/- 25 kcal, P = 0.069). Thus, when combined with a hypocaloric diet, consuming 500 ml water prior to each main meal leads to greater weight loss than a hypocaloric diet alone in middle-aged and older adults. This may be due in part to an acute reduction in meal EI following water ingestion.

    PMID: 19661958 [PubMed - indexed for MEDLINE] PMCID: PMC2859815 [Available on 2011/2/1]



    Water consumption reduces energy intake at a breakfast meal in obese older adults. [J Am Diet Assoc. 2008] - PubMed

    J Am Diet Assoc. 2008 Jul;108(7):1236-9.

    Water consumption reduces energy intake at a breakfast meal in obese older adults.
    Davy BM, Dennis EA, Dengo AL, Wilson KL, Davy KP.
    Department of Human Nutrition, Foods and Exercise, 221 Wallace Hall (0430), Virginia Tech, Blacksburg, VA 24061, USA. bdavy@vt.edu <bdavy@vt.edu>

    Abstract
    Water consumed before a meal has been found to reduce energy intake among nonobese older adults. However, it is unknown whether this effect is evident among overweight and obese older adults, a population who would benefit from strategies to improve energy intake regulation. Our purpose was to determine whether premeal water consumption reduces meal energy intake in overweight and obese older adults. Twenty-four overweight and obese adults (body mass index=34.3+/-1.2), mean age 61.3+/-1.1 years, were given an ad libitum standardized breakfast meal on two randomly assigned occasions. Thirty minutes before the meal, subjects were given either a 500-mL water preload or no preload. Energy intake at each meal was covertly measured. Meal energy intake was significantly less in the water preload condition as compared with the no-preload condition (500+/-32 vs 574+/-38, respectively; P=0.004), representing an approximate 13% reduction in meal energy intake. The percentage reduction in meal energy intake following the water preload was not related to sex, age, body mass index, or habitual daily water consumption (all P>0.05). Given the high prevalence of overweight and obesity among older adults, future studies should determine whether premeal water consumption is an effective long-term weight control strategy for older adults.

    PMID: 18589036 [PubMed - indexed for MEDLINE] PMCID: PMC2743119



    Pre-meal water consumption reduces meal energy intake in older but not younger subjects. [Obesity (Silver Spring). 2007] - PubMed

    Obesity (Silver Spring). 2007 Jan;15(1):93-9.

    Pre-meal water consumption reduces meal energy intake in older but not younger subjects.
    Van Walleghen EL, Orr JS, Gentile CL, Davy BM.
    Department of Human Nutrition, Foods and Exercise, 221 Wallace Hall (0430), Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.

    Abstract
    OBJECTIVE: To determine whether the consumption of water 30 minutes before an ad libitum meal reduces meal energy intake in young and older adults.

    RESEARCH METHODS AND PROCEDURES: Healthy, non-obese young (n = 29; age, 21 to 35 years) and older (n = 21; age, 60 to 80 years) individuals were provided with an ad libitum lunch meal on two occasions. Thirty minutes before the lunch meals, subjects were given either a water preload (WP: 375 mL, women; 500 mL, men) or no preload (NP). Energy intake at the two lunch meals was measured. Visual analog scales were used to assess changes in hunger, fullness, and thirst during the meal studies.

    RESULTS: There was no significant difference in meal energy intake between conditions in the young subjects (892 + 51 vs. 913 +/- 54 kcal for NP and WP, respectively; p = 0.65). However, meal energy intake after the WP was significantly reduced relative to the NP condition in the older subjects (682 + 53 vs. 624 +/- 56 kcal for NP and WP, respectively; p = 0.02). This effect was caused primarily by the reduction in meal energy intake after water consumption in older men. Hunger ratings were lower and fullness ratings were higher in older compared with younger adults (p < 0.01). Fullness ratings were higher in the WP condition compared with the NP condition for all subjects (p = 0.01). No age differences in thirst were detected during the test meals.

    DISCUSSION: Under acute test meal conditions, pre-meal water consumption reduces meal energy intake in older but not younger adults. Because older adults are at increased risk for overweight and obesity, intervention studies are needed to determine whether pre-meal water consumption is an effective long-term weight management strategy for the aging population.

    PMID: 17228036 [PubMed - indexed for MEDLINE]


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