Bengaluru gym trainer dies after fight at apartment party. A 25-year-old gym trainer died after sustaining a serious head injury during a fight at a gym anniversary party held at an apartment complex in Bengaluru's Sahakar Nagar on Saturday night, police said. The deceased has been identified as Nandan, a gym trainer. Amruthahalli police have detained four of his friends for questioning and have registered a murder case.