Importance of Water Drinking in obese patients

AIM:

• To reduce weight
• To improve the quality of life
• To prevent complications

WATER DRINKING:

MECHANISMS:

                    * Drinking half a litre of water

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Increases activity of the sympathetic nervous system 

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       & it was shown to increase energy expenditure

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         appear to be mediated through the activation of the sympathetic nervous system

      * Boschmann et al., showed that the sympathetic activation after water drinking 

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        might stimulate thermogenesis and increase resting energy expenditure by 30%

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     within 10 min of drinking the water (peaked at 30-40 min) and was sustained for over an hour.

Sympathetic activation may be due to following reasons:

• Water temperature
• Distension of gastrointestinal organs
• Changes in osmolarity 

*consuming water before a meal or with a meal reduces sensations of hunger, and increases satiety.

                          * Increased water intake 

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            Associated with loss of body weight 

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                              via two mechanisms

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             decreased feeding and increased lipolysis

                              * Increased water intake 

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                  leads to an increase in blood volume 

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 with an attendant increase in right atrium pressure

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   This would release atrial natriuretic peptide (ANP),

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               activates uncoupling protein 1 (UCP1) 

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                  that increases fat metabolism and 

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                     leads to a loss of body weight