Which aspect is not characteristic of reactive strength tests?

Reactive strength tests typically assess an athlete's ability to produce force quickly in response to a stimulus, often involving jumping activities. One of the primary characteristics of these tests is that they can be utilized by a wide range of individuals, not just elite athletes. This inclusive nature means that reactive strength tests can effectively measure improvements in strength and plyometric performance for athletes at various skill levels, including recreational and amateur athletes.

When considering why the aspect of being "only suitable for elite athletes" is not characteristic of reactive strength tests, it’s important to note that these tests are designed to evaluate characteristics that are beneficial across different levels of athleticism. They may need to be scaled or adapted for different populations, but the fundamental principles apply universally.

In contrast, the other options reflect true characteristics of reactive strength tests. Specific jump heights may be used to standardize assessment. Familiarization is necessary to ensure clients understand how to perform the tests effectively and safely, thus improving reliability. Moreover, reactive strength tests often include expected variations in protocol, as adjustments may be made based on the athlete's performance or to better suit their individual needs.