Other Effects

Caffeine has been reported to increase work output and endurance in long-term exercise regimens. Ergogenic properties of caffeine have been observed in many studies of athletic performance but are subject to confounding factors: nature of activity, degree of training of athletes, level of caffeine tolerance, and habitual caffeine usage. There are also many "no effect" reports. An interesting interpretation of these varying results is that the mood-elevating properties of caffeine may be responsible for some of the positive effects reported (38).

Caffeine produces a mild diuresis in humans and increases the excretion of sodium, potassium, and chloride ions (28). The thermogenic properties of caffeine cause an increase in the resting metabolic rate. Consideration has been given to its use in managing obesity (39). Respiratory rate is increased by caffeine at a plasma level of 5 mg/L. The mechanisms for this stimulation are complex and involve many separate effects. They include increased pulmonary blood flow through vasodilation, increased sensitivity of the respiratory centers to carbon dioxide, and improved skeletal muscle contraction (28). This multiple response is utilized in the treatment of infantile apnea.

How To Reduce Acne Scarring

How To Reduce Acne Scarring

Acne is a name that is famous in its own right, but for all of the wrong reasons. Most teenagers know, and dread, the very word, as it so prevalently wrecks havoc on their faces throughout their adolescent years.

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