Both the OPD and the SSD told me not to worry about my age at all. I'm 39. The OPD recruiter said that many times a department will hire a person who has had some life experience over somebody that's still pretty young. I'm not worried about it, anymore. I recently went out to a practice session out at the Sheriff's obstacle course, and came away with the third fastest time out of 20 people (ten men, ten women). I know there's more to deal with once one is in the academy, but I'm not that concerned about the physical stuff. until I get into an academy, I'll keep working out with a definite focus on cardio.