Complete Psionics Handbook[]
Rejuvenation: This proficiency allows a character to recover PSPs while he meditates, as quickly as if he were sleeping. The character achieves a state of deep concentration, in which he focuses and regains his energies. He is still conscious and aware of his surroundings, so he does not suffer any penalties on surprise or initiative rolls, and he is not helpless if attacked (he still can't expend PSPs, however).
Player's Option: Skills & Powers[]
Rejuvenation: This proficiency allows a psionicist to recover PSPs more quickly than is usual by entering a rejuvenating trance. This state of deep concentration requires a successful proficiency check. For every hour a hero maintains this trance (and makes the check), he regains PSPs at twice the usual rate (one-quarter of his total instead of one-eighth). He can't expend PSPs while in this trance, and his state is much like deep sleep.
Campaign Option: Council of Wyrms Setting[]
Rejuvenation is only available to gem dragons. It allows a gem dragon to recover PSPs while meditating, as quickly as if sleeping. In this meditative state, the dragon is still conscious and aware of its surroundings-it suffers no penalties on surprise or initiative rolls, and is not helpless if attacked. In this state, the dragon cannot expend PSPs, however. Hatchlings can't select this proficiency.