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The term "Triple Extension" in Olympic weightlifting specifically refers to the simultaneous extension of the hips, knees, and ankles during the explosive phase of a lift, particularly in movements like the clean and the snatch. This combined extension is crucial for generating maximum upward force and power, allowing the lifter to effectively lift heavier weights.

The mechanics of Triple Extension involve the coordinated action of all three joints to create an upward momentum that helps in lifting the barbell efficiently. By mastering Triple Extension, athletes can enhance their lifting performance, as it optimally utilizes the power generated from the legs and hips, contributing to a more successful lift.

In contrast, other options do not accurately represent this concept. While the simultaneous extension of arms and legs is part of the overall movement dynamics in weightlifting, it does not define Triple Extension. The phrase is not simply about weightlifting technique or explosive strength, although those elements are involved; instead, it specifically highlights the joint actions that occur simultaneously during the powerful lift.