This theory came from the fact Vegeta already reached well-beyond normal Saiyan limits and faired no better in a second round against Black after healing from his previous beating against the latter.

In the Dragon Ball Super manga, Future Trunks theorizes that Saiyans can only increase their power from this ability up to a certain point. After Gohan is healed by Dende in his battle with Super Buu, Buu notes that Gohan did not appear any stronger than before. from Saiyan Power as a result of near-death experience became negligible. There also appears to be a lack of consistency on how potent the increase in power will be, for example: Vegeta's power level only went up moderately after healing against Goku going from 18,000 to 24,000, while Goku's power level went up massively after he was injured in the battle with the Ginyu Force going from 90,000 to 3,000,000 with a single boost.ДЄfter the events on Namek, the power gained by Goku and co. In the case of Cell's self-destruction, it is possible that his Saiyan attributes were improved akin to his Namekian attributes allowing him to regenerate well-beyond a true Namekian's capabilities. Another possibility is that the extreme gravity training took its toll on Goku. However, it is possible that Goku's boost came from a blast he didn't control. Although, this is disputed by Goku's power increase while healing from his extreme gravity training and by Cell powering up after his self-destruction. When fully transformed into a divine form, the Saiyan is shown able to survive most otherwise-fatal injuries and likewise able to regenerate from the damage.Д®ven though it reaching a certain level of power seems to stop Saiyan's from growing stronger once they recover with Saiyan Power, they are still shown to be able to improve during prolonged fights.ДЄs noted by Vegeta, a Saiyan cannot increase their power from self-inflicted wounds. Even mere moments of pain or struggle will cause a quick and noticeable boost.

It allows one to heal at accelerated rate of mere seconds and likewise prove a noticeably more potent increase in power and efficiency. It is shown that accessing godly ki can greatly enhance the usage of Saiyan Power. Saiyan Power seems to increase noticeably after each use. The more severe the damage they recover from, the more significant the improvements will be, effectively making prolonged battles more favorable to them.

As it does, their minds and body adapt to the said struggles, allowing their instinctual methods and natural resistance to noticeably improve, which also increases their physical might and general efficiency as they recover, thereby lessening the chances of the problem happening again. During which, the Saiyan will imprint on the injuries and/or experiences and instantly learning from it. This power allows a Saiyan to recover from harm in relatively short periods of time.

Half life power up