While athletes and some researchers believe that testosterone produces a mass improvement in performance and endurance, others believe that it cannot produce overnight effects. It cannot give a jolt of energy to sportspersons in order to improve their performance, since testosterone acts over time to build muscle and strength in the athlete. But even then, there has to be a considerable amount of effort (in terms of exercise) on the part of the athlete. Simply taking testosterone without any exercise or a suitable diet will only do more harm than good.
Hody Jones has shown extreme power with his Fishman Karate, so much that Usopp claimed that he was above Arlong; this mighty strength has further been boosted by Hody's overdose on the Energy Steroid drugs. However, Jinbe regarded Hody as a novice compared to himself.  This is later evidenced when he was unable to do any damage to Luffy causing him to comment that Hody's level was inferior to Jinbe's. Additionally, much of Hody's power was a result of his use of Energy Steroids and without them he could no longer use these moves as he had been overdosing on the Energy Steroids; this eventually stripped him of all of his natural prowess, rendering him a frail and weak old man, and the fact that he was arrested and put in the prison of the Ryugu Palace.