Open Access Research Paper Views (886) Effect of caffeine ingestion on blood lactate and FFA in young taekwondo players after interval exercise Seyed Abdollah Hashemvarzi, Seyed Nemat Khalifeh, Mohammad Reza Yeylaghi, Mohsen Kazemi J. Biodiv. & Environ. Sci. 5(2), 586-590, August 2014. Keywords: Caffeine, FFA, Interval Exercise, Lactate, Taekwondo Details