In a cable lift (a low‑to‑high diagonal pattern), the lower body drives the movement by extending through the ankles, knees, and hips to transmit force upward. At the end of this drive, the knees are in an extended position—makingextensionthe correct end‑range description. This aligns with NASM’s movement‑science framework for sagittal‑plane joint actions at the knee.
From the NASM CPT7 Study Guide’s movement section: “Movement is described in three dimensions that are based on planes, which include the sagital, frontal, and transverse planes.” Within the sagittal plane, “Movements in the sagital plane includeflexion and extensionand plantar flexion and dorsiflexion of the foot and ankle.” During a ground‑driven lift pattern, the body uses a closed‑chain strategy: “Closed‑chain movements anchor the body to the ground or immovable object,” which is typical when initiating powerful upward motions from the legs. NASM also describes how efficient force production unfolds: the “integrated performance paradigm” indicates that to move efficiently, “forces must bedampened (eccentrically), stabilized (isometrically), and then accelerated (concentrically).” In the cable lift, the knee flexes slightly to load (eccentric/stabilize) and thenextendsconcentrically toaccelerate the load upward. Because the knee’s sagittal‑plane action that completes the propulsion phase is extension, theend‑range position of the knees—after the drive is completed—isextension. Therefore, among the options provided,B. Extensionprecisely matches NASM’s definitions and movement sequencing.
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