Angelv577 on 03 July 2013
If I am not mistaken, goku always got better results in training due to taking some rest when the body most needed, In fact, goku make references in the series as to why resting the body was important, that's why he decided no enter in the hyperbolic time chamber the second time. The other reason for the better improvement is because he always has someone as a training partner, vegeta prefer to train alone.
