What high-stack running shoes change mechanically, and why extra sole height is only one part of running efficiency.
What is a high-stack shoe?
High-stack running shoes place more midsole material between the foot and the ground. That can change cushioning, stiffness, rocker geometry and the way the shoe interacts with your stride.
Do they make your legs longer?
They increase standing height slightly, but running performance is not simply a matter of creating a longer leg. Efficiency depends on shoe mass, foam properties, stiffness, rocker shape, cadence, contact time and the runner’s individual mechanics.
Who may benefit
Some runners prefer the cushioning and smooth rollover of modern high-stack shoes, especially for longer sessions. Others feel less stable or dislike the altered ground feel. Shoe choice should match the runner, the task and any injury history rather than being based on stack height alone.