Ischial tuberosity pain in athletes may be caused by bony avulsions or apophysitis. Apophysitis of the ischial tuberosity is a rare condition observed in adolescents who participate in sports, it causes gradual increasing functional and palpable pain at the ischial tuberosity without any major trauma at the beginning of the symptoms. Bilateral apophysitis is very rare, and the reason that Taekwondo practitioners may develop it is due to stretching exercises of both lower extremities. Repeated traction can cause an apophysitis at 15-17 ages when the ossification process of the apophysis is ongoing. Conservative treatment is adequate for apophysitis. We report the clinical and radiologic findings in detail.