tailieunhanh - Handbook of Industrial Automation - Richard L. Shell and Ernest L. Hall Part 17

Tham khảo tài liệu 'handbook of industrial automation - richard l. shell and ernest l. hall part 17', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1. Gender 2. Age distribution 3. Relevant anthropometry height weight etc. 4. Sample size 5. Method by which sample was selected and who it is intended to represent 6. Extent of strength training done by participants and their experience with isometric testing 7. Health status of participants medical exam and or health questionnaire recommended. Strength Data Reporting The minimum data which should be reported for strength-testing projects are 1. Mean median and mode of data set 2. Standard deviation of data set 3. Skewness of data set or histogram describing data set 4. Minimum and maximum values. Evaluation According to Physical Assessment Criteria A set of five criteria have been purposed to evaluate the utility of all forms of strength testing. Isometric strength testing is evaluated with respect to these criteria in the following sections. Is It Safe to Administer Any form of physical exertion carries with it some risk. The directions for the person undergoing an isometric test specifically state that the person is to slowly increase the force until they reach what they feel is a maximum and to stop if at any time during the exertion they feel discomfort or pain. The directions also expressly forbid jerking on the equipment. When isometric testing is performed in this manner it is quite safe to administer because the tested person is deciding how much force to apply over what time interval and how long to apply it. The only known complaints relating to participation in isometric testing are some residual soreness in the muscles which were active in the test s and this is rarely reported. Does the Method Provide Reliable Quantitative Values The test-retest variability for isometric testing is 510 . In the absence of a specific strength training program individual isometric strength remains relatively stable over time. When the number of trials is based on the 10 criterion discussed earlier the recorded strength is near or at the