Aside from the obvious "empty" calories (devoid of any nutritional benefit) associated with carbonated drinks, these ubiquitous and popular beverages are relatively high in acidity due to high amounts of phosphoric acid content. The pH can be as low as 2 to 3 on a scale from 0 to 14 with 0 being associated with battery acid. Your body must neutralize the acidity level (pH approximately 7.365) during digestion. Calcium must be leached out from your bones in order to neutralize the high acidity. Chronic consumption over time may cause osteoporosis due to excess calcium depletion from your bones. Osteoporosis is a disease which will make you vulnerable to bone fractures. In addition to calcium depletion, magnesium may also be leached out from your muscles which can cause muscle cramps, pain and fatigue.
Many carbonated drinks contain loads of sugar which of course will cause weight gain. Because of the high sugar content in many of these beverages, consuming these drinks either before or after a workout may cause a sudden drop in blood sugar level which causes fatigue and weakness.
Here are some of the adverse effects from chronic consumption of carbonated beverages:
Brian Danley, CFT
"Motivation is what gets you started. Habit is what keeps you going."
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I'm a personal trainer who loves to help others fulfill their health and fitness goals. I consider myself a bodybuilder in that I live the lifestyle of eating healthy food, working out regularly, and sculpting my body.