"The physical quality of humans definitely could not compare with that of a real Terrestrial Dragon, so one couldn't increase their strength too drastically all at once, or else it was easy to end up with deformities and uncoordinated movements,"
Pain in the thighs was a clear signal; if one did not undergo tempering training in time, it could easily lead to deformities in the lower body, with both legs growing thick and ugly.
Online tutorials explained that besides tempering training, there was another method to solve this problem, namely practicing a kind of 'Crab Step'. It not only could resolve issues of physical deformity, but also enhance agility in changing directions.
However, to practice this 'Crab Step', one needed to consume a certain medicinal herb to prevent bodily deformities, and the price was very high.
Zhang Dahai simply didn't have the money, so he had to take the most conventional route.
