The biosocial model is the most important hypotheses to interpret the relationship between testosterone and social competition and social status seeking. According with this model, victor men increase T levels and defeated men drop after losing and high postgame cortisol levels. Badminton could be an excellent sport to study the psychophysiological response to competition. We present a study in 18 elite men double players randomly chosen from the XXIII Spanish International Badminton Tournament: age 21.51 +/- 3.22 years; BMI 22.80 +/- 1.49 kg/m(2). Saliva sampling (to estimate hormonal concentrations), CSAI-2, blood lactate and rating of perceived exertion was taken. Pregame and postgame hormonal response showed that testosterone levels increase after winning (z = -2.366, p = .018) and drop after losing (z = -2.934, p = 0.003). Postgame cortisol levels decrease after winning (-23.90 %, z = -2.366, p = 0.018) and were significantly higher in defeated men (128.28%, z = -2.934, p = 0.003). Psychological measures and postgame lactate concentrations showed no differences between groups, nevertheless rating of perceived exertion was higher in losers (z = -3.303, p = 0.001). Hormonal response patterns to men doubles badminton competition was congruent with the biosocial model: victor men double players showed testosterone rises and cortisol drops after win a match, while defeated men showed important rises in cortisol.