Running Macrometric - Torsional Stiffness

What is Torsional Stiffness?

The macrometric torsional stiffness refers to a running shoe’s resistance to twisting along its longitudinal axis when subjected to rotational forces during the gait cycle. At a macroscopic level, it describes how the entire shoe structure—midsole, outsole, and upper—works together to control excessive twisting between the heel and forefoot.

Appropriate torsional stiffness plays a key role in maintaining alignment and stability as the foot transitions from initial contact to toe-off. Shoes with higher macrometric torsional stiffness help limit unwanted rotational movement, which can improve midfoot support and enhance control for runners who need added guidance or who experience instability under load. Conversely, lower torsional stiffness allows greater flexibility, promoting natural foot motion and adaptability, which may benefit runners with efficient mechanics or those prioritising agility and ground feel.

In running shoe selection, macrometric torsional stiffness should be balanced with cushioning, flexibility, and overall geometry. Rather than being inherently “good” or “bad,” the optimal level depends on the runner’s biomechanics, pace, terrain, and performance goals. When matched correctly, torsional stiffness contributes to smoother transitions, improved efficiency, and reduced mechanical stress over repetitive strides.