Effects of ephedrine/xanthines on thermogenesis and cold tolerance

This paper reviews the use of ephedrine (E) and xanthines (X) to improve thermogenesis and cold tolerance. Recent experiments in cold-exposed subjects have shown that the beneficial effects of ingesting and E/caffeine (C) capsule on metabolic rate (M), heat debt, deep body core temperature (T re ) (P<0.05) is entirely comparable to that observed with an E/C/theophilline (T) capsule. Although T has been reported to reduce the drop in T re in several studies, these improvements are difficult to explain in the absence of changes in M