Train legs with heavy resistance, big compound movements like squats and deadlifts does interesting things to your hormones. A lot of people go to gym and do isolation movements and think they are lifting weights, isolation movements should be finishers for your compound movements.

Neither Calisthenics nor cardio is going to boost your testosterone like compound leg movements. Legs are the largest muscles in the body and cardio isn't going to increase muscle mass. Now I'm not saying you shouldn't do these things, I do them, but for the sake of this discussion squats and deadlifts is king.