I recently received a response from the NSCA regarding my initial question:
"A CSCS-certified individual does not have to deal with a "special" type of client because any particular "medical need" of an athlete is evaluated and addressed by the team doctor or the head athletic trainer at the institution. Also, the team doctor/athletic trainer performs the athlete's initial assessment of health (via a physical examination at the beginning of the school year or season); the CSCS typically does not have anything to do with an athlete until after the athlete has passed the initial physical examination and is ready to begin training.
The NSCA-CPT, however, must perform all of the "client consultation and fitness assessment" on the client. As a matter of fact, it is the initial medical and exercise history review and fitness evaluation that is one of the most critical responsibilities of a personal trainer. Also, the NSCA-CPT may work with training clients who have never exercised or may have pre-existing medical limitations; two situations that a CSCS usually does not have to deal with.
Further, a CSCS is required to understand the more advanced application of exercise program design as it relates to sport performance, whereas, the NSCA-CPT typically does not have to understand advanced program design. Instead, the NSCA-CPT must have a good understanding of the design of exercise programs for a variety of "special populations" (e.g., those who may be pregnant, hypertensive, diabetic, etc.). There are exceptions, however, such as personal trainers who work with competitive athletes.
A CSCS certified individual is NOT certified to work one-on-one with clients."
If the CSCS is not certified to work one-on-one with clients, how are they able to attain positions at local fitness centers?