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Modified single-leg squat jump test. A soccer player is set in position for a vertical jump on top of a switch mat (Ergo Tester; Globus), with the research team ready to record the data. The researcher on the right is certifying proper position of the athlete prior to the jump: single-leg semi-squatting position with 90° of knee flexion (measured with a standard goniometer) and both hands placed on each ipsilateral iliac crest.
