2. Physiological tests should be valid and reliable. Valid tests are tests that measure what they are supposed to measure. Reliabl tests are tests that are reproducible. Based on these definitions, the need for tests that are both valid and reproducible is clear (20). (See A Closer Look 20.1.)
3. Tests should be as sport specific as possible. for instance, the distance runner should be test while running (i.e., treadmill), and the cyclist should be tested while cycling.
4. Tests should be repeated at regular intervals One of the main purposes of laboratory testing is to provide the athlete with systematic feedback concerning training effectiveness. Therefore, to meet this objective, tests shoud be performed on a regular basis.
5. Testing procedures should be carefully controlled. The need to rigidly administer the laboratory test relates to the reliability of tests. For tests to be reliable, the testing protocol should be standardized. Factors to be controlled include the instructions given to the athletes prior to testing, the testing protocol itself, the calibration of instrumentsi involved in testing, the time of the day for testing, prior exercise, diet standardization, and other factors such as sleep, illness, hydration status, or injury.
6. Test results should be lnterpreted to the coach and athlete clearly. This final step is a key goal of effective laboratory testing.