The Hyperbolic Time Chamber (also known as The Room of Spirit and Time) Is a special room inside Kami's Palace in which Time is sped up to the point in which 24 hours equals one year. the gravity here is 10x the gravity on Planet Earth. Fighters will go in there to train and become much stronger and to even advance to a new form. In the Cell saga and Majin Buu saga, it is used heavily to train before facing the main villans. Fighters who have gone into the Hyperbolic time Chamber to become much much stronger are Gohan,Goku,Vegeta,Future Trunks, and Piccolo.