NASM Certified Sports Nutrition Coach Practice Test 2025 - Complete Exam Prep

The correct choice emphasizes the use of the thumb and forefinger on the same hand to hold the skin during skinfold assessments. This method ensures a firm yet gentle grip on the skinfold, allowing for a consistent and reliable measurement. By using these two fingers together, assessors can effectively pinch the skin and underlying fat without causing excessive compression, which can lead to inaccurate results.

Additionally, this grip facilitates a stable and controlled measurement process, as both fingers can easily manipulate the skinfold without involving complex movements that may occur with fingers from opposite hands. Proper technique is essential in skinfold measurements to ensure that the readings are reflective of the actual subcutaneous fat layer, allowing for accurate body composition analysis.

Other options may involve hands or fingers that are not well-suited for this task, leading to less reliability in measurement. This makes the selection of the thumb and forefinger on the same hand the most effective technique for conducting skinfold assessments.