Aizo took the next few days thinking about all he learned about the Io's the fact they lived 300 years, the fact they lived on a planet with over 50× the gravity of earth, on top of that on practically they had super strength speed and regeneration.
Aizo realised his new job was more important than he thought. Aizo knew if those robots weren't up to level life on Earth would be done if the Io's attacked.
Aizo decided that if defeating him was what decided the robots preparedness he needed to train to become just as powerful as an Io army.