Physical Strength, Physical Resistance, Physical Agility, and Physical Stamina. These are the four basic statistics that needed to reach 400 points in all of them without exception in order to trigger the first evolution's commencement.
That was why after discovering this information, Randy decided to train his body to increase his body's basic statistics to 400, but as time went by, he came to realize that even though he became known as the strongest human with a tough physical body compared to those who awakened their abilities, Randy still could not reach the first threshold of 400 points in all of his basic statistics no matter how much strain he put on his body.
Body evolution was his only hope of possibly awakening his innate ability or increasing his body's compatibility to a type of energy. However, all of that became useless when he awakened his innate ability.