A soy-based supplement alters energy metabolism but not the exercise-induced stress response.

Objective: To determine the changes in endurance capacity as well as in metabolic, hormonal and inflammatory markers induced by endurance training combined with a soy,protein based supplement.

Design: Randomized controlled study consisting of moderate endurance training without (GO) or with (G1) a soy protein based supplement.

Subjects: Two groups of 15 subjects (10 males and 5 females in each group): healthy sports students aged 23.