The three functional tests used were (1) a single-leg decline squat (1× and 10×) on a platform with a 20° slope and 60° knee flexion (Zwerver et al., 2007); (2) the vertical jump test (both legs
and one leg), and (3) the triple-hop test (Hamilton et al., 2008).All tests were performed with the left leg first and a practice trial was allowed before the actual test started. Participants were instructed to jump as high as possible during the vertical jump test and as far as possible during the triple-hop test; in both, the use of arms was allowed. The jumping height and the hopped distance were mea-sured. To determine the jumping height, participants touched the wall on the highest point with their fingers that were dipped in chalk.After each test, the subject was asked to indicate the amount of experienced pain using the visual analog scale (VAS). The VAS for pain ranges between 0 (no pain) and 100 mm(most severe pain) and measures chronic and acute pain in a valid and reliable way (Downie et al., 1978; Bijur et al., 2001). The order of the tests was the same for all participants and at least a 1-min break between the tests was warranted to allow for physiological recovery.