Why Every Runner Needs a Strong Core (pt. 2)

Running Is Controlled Rotation

Many runners think of core stability as "holding still." In reality, the best runners don't have rigid cores—they have responsive cores.

Your trunk must be stiff enough to transfer force while remaining mobile enough to allow efficient arm swing and pelvic rotation. Too much motion wastes energy. Too little motion increases stress elsewhere. The goal isn't rigidity. It's controlled movement.

The Principle of "Load and Explode"

One of the biggest mistakes runners make is performing only slow, low-intensity core exercises. Planks have value, but running is dynamic. Your core has to rapidly accept force and then rapidly produce force. This is where the principle of Load and Explode becomes essential.

First: Load

Teach the core to absorb force. This means allowing active lengthening at a joint or region under increasing loads .

Examples include:

• Planks with hip drivers

• Overhead reaches

• Reverse nordic curls

The goal is building the capacity to handle force while lengthening the muscles without losing positioning.

Then: Explode

Once stability is established, train the core to create force quickly.

Examples include:

• Medicine ball slams

• Rotational throws

• Overhead throws

• Plyometric plank variations

• Bounding drills

Running is essentially a series of controlled explosions. Every foot strike requires your core to absorb hundreds of pounds of force before rapidly redirecting that energy into the next stride. If your training never includes explosive core work, you're missing a critical piece of performance.