The software "Muscle Contraction : "Biochemical Aspects of Sportive Practice" was designed to promote the association between the content of a basic undergraduate biochemistry course and the professional activities of physical education students. The software contains four main content sections (A) Structure of skeletal muscle. (B) Contraction mechanism. (C) Metabolism. (D) Questions. Article published about this software: Galembeck E, Macedo DV, Torres BB, Different energy sources in sports - Introductory software, BIOCHEMISTRY AND MOLECULAR BIOLOGY EDUCATION 31 (3): 204-208 MAY-JUN 2003.