The awakening ability of a normal person is related to their hidden attributes. For instance, those with healing-type hidden attributes will become healing-type ability users after awakening.
However, the awakening ability of those who awaken through the use of an awakening potion seems to be fixed—it's only said to "seem" because the sample size is not large enough to be certain. Anyway, as of now, there have been a total of 5 volunteers who successfully awakened using the awakening potion, and all 5 have awakened the same ability.
As to what specific ability it is, Qu Shilin couldn't say, as she can't see the attributes. She only knows it's a system awakening that enhances physical fitness, and it seems not very strong compared to other system awakeners.