Does Fasting during Ramadan Alter Body Composition, Blood Constituents and Physical Performance?

Ramadan, Jasem

doi:10.1159/000066413

Cited by 101 publications

(106 citation statements)

References 11 publications

(11 reference statements)

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“…This was parallel with the results of some studies in which no significant difference in body weight and body composition were observed with Ramadan fasting (El Ati 1995;Finch et al 1998;Ramadan 2002). It was explained by qualitative and quantitative circadian changes of feeding during Ramadan being counterbalanced by specific metabolic changes in order to preserve normal body weight and composition (El Ati et al 1995).…”

Section: Discussionsupporting

confidence: 85%

“…In general, a reduction in body weight was reported during Ramadan fasting (Husain et al 1987;Hallak and Nomani 1988;Sweileh et al 1992;Ramadan et al 1999), but some groups may gain weight during this month (Frost and Pirani 1987;Hallak and Nomani 1988). No significant changes in body weight and body composition were also reported (El Ati et al 1995;Finch et al 1998;Ramadan 2002).…”

Section: Patient Populationmentioning

confidence: 96%

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The Effect of Fasting Month of Ramadan on the Abdominal Fat Distribution: Assessment by Computed Tomography

Yücel

Değirmenci

Açar

et al. 2004

Tohoku J. Exp. Med.

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The aim of this study was to evaluate the changes in abdominal fat distribution in the fasting month of Ramadan. Thirty-eight healthy volunteers (17 women and 21 men) who fasted in the month of Ramadan in 2002 were included in this prospective study. Waist, hip and thigh circumferences, weight and height of all subjects were measured. Waist-to-hip ratio (WHR), waist-to-thigh ratio (WTR) and body mass index (BMI) were calculated for each subject. For assessing the fat distribution in the abdomen, computed tomography (CT) was performed. Both subcutaneous and visceral fat areas were calculated by the CT scanning technique. All of the calculations were done before (first measurement) and after (second measurement) Ramadan fasting and the changes were evaluated. No statistically significant differences were found in all subjects between the first and second measurements, which include total, subcutaneous and visceral fat areas, waist, hip and thigh circumferences, weight, BMI, WHR, and WTR (p > 0.05). In females and the individuals in their twenties, there was a significant decrease in visceral fat area (p < 0.05). Despite of the general opinion that supposes the change of weight during the fasting month of Ramadan, there were no significant differences in weight and abdominal fat distribution. However in female and young individuals, there was a reduction in visceral fat compartment. This could be due to fat redistribution, because they have more physical activity than males and older individuals. computed tomography; fat; abdomen

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Section: Discussionsupporting

confidence: 85%

Section: Patient Populationmentioning

confidence: 96%

The Effect of Fasting Month of Ramadan on the Abdominal Fat Distribution: Assessment by Computed Tomography

Yücel

Değirmenci

Açar

et al. 2004

Tohoku J. Exp. Med.

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“…They concluded that deficits or redistribution of specific micronutrients may account for reductions in platelet counts. Ramadan, (2002), explored the effect of Ramadan fast on body composition, plasma constituents, hematology, and cardio respiratory responses to constant sub-maximal exercise. Also, Bouhlel et al, (2006) who investigated the effect of sub-maximal exercise in nine trained rugby player in three occasions and two statuses: before, first week, last week of Ramadan fasting, and at rest and acute exercise.…”

Section: Introductionmentioning

confidence: 99%

Ramadan Fasting and Weight-Lifting Training on Vascular Volumes and Hematological Profiles in Young Male Weight-Lifters

Tayebi¹,

Hanachi²,

Ghanbari–Niaki³

et al. 2010

GJHS

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During the holy month of Ramadan the quality of food and eating patterns changed and drinking will be stopped for at least 10 to 16 hours on the basis lunar calendar. The effects of exercise and fasting solely or combined on metabolic and hematologic responses well established. The purpose of the present study was to study the effects of Ramadan fasting with or without weight-lifting training on vascular volumes and selected hematological indices in young male weight-lifters. Blood samples were taken at 24h before and 24h after the last day of holy Ramadan fasting period and weight-lifting training for determination of the selected red and white blood cells compositions. The Vascular volumes (Blood, Red cells, and plasma volumes) were determined and calculated by using both hemoglobin and hematocrit estimations before and after Ramadan fasting with or without weight-lifting training. The results indicate that red cell volume and MCHC were significantly decreased and increased in fasting group (P<0.05) respectively. The percentages of hematocrit were significantly low in both training and fasting groups. A higher and significant platelet count was found in training group. The present data indicate that weight-lifting training during the holy Ramadan in compare to fasting had no impact on red and white cells composition exception on platelet count and Hematocrit. A decrease in Hematocrit might be due to the incomplete dehydration period which amplified by stop drinking and nutritional habits during the holy Ramadan.

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“…The majority of Indonesian people are Muslims, who are obliged to fast (total abstinence from food and drink) for as long as 14 h (from 0330 to 1730) each day for a month. Many studies have been conducted to evaluate the impact of Ramadan fasting on various aspects of health, including lipid metabolism (Fedail et al, 1982;El Arnoaty and Johnson, 1991;Adlouni et al, 1997), acute coronary heart disease and respiratory system (Temizhan et al, 1999;Ramadan and Barac-Nieto, 2000), water balance (Duncan et al, 1990;Schmahl and Metzler, 1991;Leiper et al, 2003;Basiri et al, 2004), dietary intake, endocrine function, serum fructosamine, and clinical, anthropometrical, and most biological parameters (Habbal et al, 1998;Perk et al, 2001;Beltaifa et al, 2002;Ramadan, 2002;Gharbi et al, 2003;Gustaviani et al, 2004;Kassab et al, 2004;Yucel et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…First, all of these studies focused exclusively on fasters (Fedail et al, 1982;Frost and Pirani, 1987;Hussain et al, 1987;Hallak and Nomani, 1988;Ch'ng et al, 1989;Iraki et al, 1997;Bigard et al, 1998;Perk et al, 2001;Beltaifa et al, 2002;Ramadan, 2002;Roky et al, 2004) and neglected nonfasters, who constitute an important control group. Second, because blood sampling during fasting is often regarded as intrusive, many of these studies were conducted with small sample sizes, and some studies involved gender-mixed sampling (Hussain et al, 1987;Habbal et al, 1998) or sampling after Ramadan rather than during Ramadan (Yucel et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Unexpected changes in blood pressure and hematological parameters among fasting and nonfasting workers during Ramadan in Indonesia

et al. 2006

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Objective: To examine the effect of Ramadan fasting on basic hematological parameters, in addition to the effects on body weight and blood pressure of fasters and nonfasters. Design, setting, and subjects: One hundred male outdoor workers at a vehicle terminal in a city in East Java were recruited for this study. Anthropometric measurements and blood sampling were conducted on two separate occasions, just before the start of Ramadan and in the third week of the month of Ramadan (October-November 2004). The degree of subjective compliance with Ramadan fasting (complete, partial, or none) was evaluated using a questionnaire. Results: The mean body mass index (BMI) of the fasting group was, as expected, significantly lower at the second sampling period, and the decrease in BMI correlated significantly with decreased blood pressure in this group. The blood pressure was also reduced in the partial fasting and nonfasting groups, which was an unexpected result. While red blood cell production was suppressed, as evidenced by lower levels of hemoglobin, red blood cell (RBC), and packed cell volume (PCV) at the second sampling, the subjects were normocytic and normochromic, based on normal mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC) levels. Conclusions: These results indicate that, regardless of fasting status, blood pressure is lower and RBC production is suppressed in subjects during the Ramadan period. These findings should be taken into account when evaluating the effects of Ramadan on the general population. To avoid the adverse effects of anemia, increased intake of iron-rich foodstuffs is recommended during the Ramadan month, regardless of fasting practice.

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Does Fasting during Ramadan Alter Body Composition, Blood Constituents and Physical Performance?

Cited by 101 publications

References 11 publications

The Effect of Fasting Month of Ramadan on the Abdominal Fat Distribution: Assessment by Computed Tomography

The Effect of Fasting Month of Ramadan on the Abdominal Fat Distribution: Assessment by Computed Tomography

Ramadan Fasting and Weight-Lifting Training on Vascular Volumes and Hematological Profiles in Young Male Weight-Lifters

Unexpected changes in blood pressure and hematological parameters among fasting and nonfasting workers during Ramadan in Indonesia

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