Assertion: countermovement jump | /r/HasProperty | cmj
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Source sentences:
text: For instance, it has been shown that subjects achieve a greater jump height in a so-called countermovement jump (CMJ), where they start from an erect position and make a downward movement before starting to push-off, than in a so-called squat jump(SJ), where they are instructed to start from a semi-squatted position and make no countermovement.