Why are dynamic flexibility tests NOT used as often as static flexibility tests? A. Dynamic flexibility tests involve more subjective measurements. B. Static flexibility tests are less expensive to perform. C. Dynamic flexibility tests do not provide useful data. D. Static flexibility tests are more difficult to standardize. Please select the best answer from the choices provided. A B C D

A

Step-by-step explanation:

- Dynamic flexibility tests involves measure the amount of stress on a muscle that is in motion.

- Static flexibility tests involves measure the amount of stress on a muscle that is stationary.

- Dynamic study is subjected to infinitely many solutions with singularities ( Points where solutions may not exist ) or entail paradoxes. This makes Dynamic study both hard and subjective to measurements. Usually an experimental techniques are adopted with data acquisition systems.

- Despite the subjectivity of dynamic study to measurements and more prone to experimental errors it provides a closest approximations to realistic situations.

- Since, many solutions exist for dynamic flexibility tests with uncertainties and singularities it is rather difficult to standardized the results; however, numerical approximations and empirical results are developed for different conditions.  

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the answer is the third / last answer

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