Do test takers have to wait a certain period of time after activity before taking a baseline or post-injury test? It’s important that test takers do not take their test within 3 hours of strenuous physical exertion. This means no testing directly after practice, PE class, or game. Updated on 01/28/2019 Was this article helpful? Yes No Related Articles What is the Two-Factor Score? What are the differences between ImPACT and ImPACT Version 4? Is ImPACT Version 4 available in languages other than English? How do I know whether I should use the Two-Factor Score or the 4 composite scores when interpretating the ImPACT Clinical Report data? How do I find the ImPACT test version? If I administer a post-injury test with ImPACT Version 4, can I compare it to a test taker’s baseline from an older version of ImPACT?