Androgen receptor gene microsatellite polymorphism is associated with muscle mass and strength in bodybuilders and power athlete status.

Background: The androgen receptor () gene contains a polymorphic trinucleotide (CAG) microsatellite repeat sequence (short or long alleles) that has been associated with fat-free mass in untrained men, which needs to be replicated in athletic cohorts.

Aim: The purpose of this study was to explore the (CAG) polymorphism in trained individuals.

Subjects And Methods: A total of 61 professional bodybuilders (40 males, 21 females), 73 elite male sprinters and weightlifters and 186 male controls were enrolled in this study.