Which of the following exercises is a regression in intensity from a box jump-up with...

NASM’s plyometric training progressions and regressions are based on the force and stability demands of an exercise. A box jump-up with stabilization requires explosive concentric force to jump vertically onto a platform, followed by an isometric hold. A box jump-down with stabilization removes the explosive vertical propulsion requirement and instead focuses on eccentric force absorption and landing mechanics, which generally reduces intensity.

Horizontal jumps, squat jumps, and transverse jumps with stabilization typically demand more power output or multi-planar coordination than a controlled step/landing from a box. Thus, among the listed choices, the box jump-down with stabilization is the regression because it lowers concentric demand while still training landing control and joint stabilization—making it safer for clients not yet ready for the more intense jump-up variations.