The aim of this study was to find the effect of Psidium guajava 1. Leves extract on exercise. Extensor digitorum longus muscle MDA level MDA level in Rattus norvegicus resulting from anaerobic exercise. The study was a laboratory experimal study using the randomized post test only control group design. There were three groups in this study (group 1, 2 and 3). Group 1 was control, receiving only…