NSCF Certified Personal Trainer Practice Exam 2025 – All-in-One Guide to Achieve Certification Success!

For a client aiming to complete eight repetitions to volitional fatigue on the leg press, selecting an intensity of approximately 80% of their one-repetition maximum (1RM) is most appropriate. At this level of intensity, the resistance is challenging enough to prompt significant muscular effort, allowing most individuals to reach near failure by the eighth repetition.

Training at 80% of 1RM typically correlates with the ability to perform about 6 to 10 repetitions before fatigue sets in, making it ideal for hypertrophy and strength development. This intensity strikes a balance between adequate load and sufficient repetition range, ensuring that the client is effectively challenged without risking injury or improper form.

While lower intensities, such as 60% or 70% of 1RM, would not sufficiently challenge the muscles to reach volitional fatigue within eight repetitions, a higher intensity like 90% of 1RM would likely lead to failure before they could complete eight repetitions. Therefore, 80% of 1RM is the most suitable choice for achieving the desired goal of eight repetitions to volitional fatigue in this context.