Walking changes the stability requirement
Footfalls can move the floor, desk frame, desktop, arm, and screen. A high-capacity arm cannot compensate for a flexible desk, loose frame, or monitor mounted far beyond the desk's center of support.
Match the arm to monitor-only weight and VESA pattern
Use the display weight without its original stand and confirm the VESA interface. Keep the monitor comfortably inside the arm's supported range rather than selecting only by advertised screen size.
Inspect the clamp area above and below
Choose a flat, solid section of desktop without an apron, cable tray, control box, bevel, or hollow core at the mounting point. Check the desk maker's mounting guidance before clamping to glass or thin composite tops.
Set the screen for standing before walking
OSHA recommends placing the monitor directly ahead, with its top at or slightly below eye level and a generally comfortable 20–40in viewing distance. Establish a neutral standing setup while stationary, then begin at a slow pace.
Use a restrained arm position
Keeping the display closer to the arm post and avoiding maximum extension usually reduces leverage and visible oscillation. Stop walking before changing arm height or reach.
Leave safe cable slack through every motion
Test monitor movement and the desk's full sit-stand range with power, display, and USB cables attached. No connector should carry the load or become a trip or pinch point around the walking surface.