This excerpt from Developing the Core discusses two testing methods that may predict a strong or weak core based on how well the participant completes the task.
Personal trainersTSAC FacilitatorsCoachesTesting and EvaluationCoreSEBTSingle-Leg Squat Test
While a basic fitness assessment will always be a part of a comprehensive client assessment, there is an array of more sophisticated tests and measures that are available to the personal trainer today.
Personal trainersProgram designTesting and Evaluationfitness testinghow to measure fitnessFitness assessment