Soy protein based supplementation supports metabolic effects of resistance training in previously untrained middle aged males.

Objective: To determine changes in body composition, physical performance, metabolic and hormonal parameters induced by lifestyle counselling, resistance training and resistance training with soy protein based supplemention in middle aged males.

Design: Randomised controlled study consisting of resistance training without (RT-G) or with (RTS-G) a soy protein based supplement and a control group with lifestyle education only (LE-G).

Subjects: Forty healthy middle aged men (50-65 years, BMI 25-29.