[DOWNLOAD] "Myth Buster: Caffeine Does Not Exhibit a Diuretic Effect During Exercise Performance (Commentary)" by Felicia Greer # Book PDF Kindle ePub Free

eBook details

Title: Myth Buster: Caffeine Does Not Exhibit a Diuretic Effect During Exercise Performance (Commentary)
Author : Felicia Greer
Release Date : January 01, 2010
Genre: Life Sciences,Books,Science & Nature,Health, Mind & Body,Health & Fitness,
Pages : * pages
Size : 61 KB

Description

Research on the physiological effects of caffeine as it relates to athletic performance is extensive. While caffeine has been well established to enhance endurance performance (1-7), its impact on short-term high intensity exercise is much more controversial (8-13)' Nonetheless, researchers continue to explore caffeine's effect on performance in different environments and under different exercise conditions. Recently, during the Games of the XXIX Olympiad in Beijing, China, athletes experienced harsh environmental conditions such as poor air quality, high ambient temperatures and high humidity. Furthermore, there are various parts of the world where athletes live in such environments and thus are exposed to high temperatures and humidity during regular training and competition. Multiple mechanisms have been proposed to explain the effects of caffeine supplementation on exercise performance. One of caffeine's primary sites of action is the central nervous system (CNS). Caffeine can easily cross the blood brain barrier as well as cellular membranes of all tissues in the body (14,15). For this reason it is difficult to determine in which physiological system caffeine has the greatest impact. While the exact mechanism related to caffeine's ergogenic effect on exercise is unknown, it has been shown to alter intramuscular pH, muscle force production, central fatigue and metabolic function (16-20). Thus, it would appear that the ergogenic impact of caffeine on exercise performance is due to its effect on both central and peripheral systems. Further, it is likely that a combination of mechanisms (e.g. adenosine receptor antagonist in addition to caffeine's effect on neuromuscular function) may be operating at the same time.