Which of the following data should a trainer obtain when gathering objective information for a...

When collecting objective information in a fitness assessment, NASM includes measurable physiological data such as resting heart rate, blood pressure, body composition, postural assessment results, and performance metrics.

Medical history, past injuries, and past surgeries are subjective information gathered from client self-reports. Blood pressure, however, is measured by the trainer using a sphygmomanometer, making it objective and quantifiable.