The Incomplete Traditional Speed Formula in Running

The traditional speed formula in running is incomplete. Without a key element, cadence and stride length cannot explain or produce running speed. That’s why your speed doesn’t improve.

If you are trying to run faster, you are probably relying on a familiar idea: speed is distance over time. In running, this is usually expressed as cadence multiplied by stride length. The logic appears straightforward. Increase cadence, increase stride length, or adjust both, and speed should improve.

Yet – it does not work that way. You increase cadence and feel rushed and unstable. You try to increase stride length and feel heavy, slow, or injured. Effort rises, but speed does not improve in proportion. The more you try to “add” speed, the more resistance you encounter.

This is not because you are doing something wrong. It is because you are working with an incomplete formulation—one that cannot produce the result it promises.

What Problem Are You Actually Trying to Solve?

Most runners believe the problem is how to manipulate cadence or stride length. That belief comes directly from the way speed is usually presented. The formula shows cadence and stride length as the components of speed, so it is natural to assume they are the levers you should pull.

But ask yourself a simpler question: what makes forward motion possible in the first place?

Cadence and stride length describe motion once it exists. They do not explain how it comes into being. Without forward motion, there is no distance to measure and no speed to calculate.

So the real problem is not how to move your legs faster or farther. The real problem is understanding what allows forward motion to occur at all.

Why the Traditional Speed Formula Fails Runners

The traditional speed formula assumes something it never states: that forward motion is already present. It treats distance and time as given, without accounting for the condition that makes distance possible.

In running, forward motion exists only because gravitational acceleration is being used. Gravity’s acceleration is constant. That is the condition under which all human movement takes place. What varies from runner to runner is not gravity itself, but how much of that available acceleration the runner is capable of using.

If this condition is not included, the formula is not merely incomplete as a coaching tool; it is incomplete as a description of running itself. Cadence and stride length cannot explain speed unless the use of gravitational acceleration is already accounted for.

The Missing Ingredient: How Much Gravity You Can Use

The amount of gravitational acceleration a runner can use is expressed by the angle of falling. The falling angle shows how the body is positioned relative to support and, therefore, how much of gravity’s acceleration can be consumed in the forward direction.

As the falling angle increases, a greater portion of gravitational acceleration becomes available for movement. The body accelerates forward more. Balance is lost sooner, and support must be changed more quickly. Cadence increases as a consequence, not because the runner decides to move the legs faster.

At the same time, the body travels farther forward during each cycle. Stride length increases not through reaching or pushing, but as a result of using a greater portion of the gravitational acceleration that is already present.

Seen this way, cadence and stride length are no longer causes. They are expressions of how much gravity is being used.

Control, Capacity, and Skill

Understanding the falling angle changes the question of control. Speed is not something you force by muscular effort. It becomes controllable as a skill, to the degree that the runner has the capacity to consume a greater portion of gravitational acceleration.

That capacity is not something you consciously switch on. The nervous system and muscles are not objects of direct control in running. They represent readiness and adequacy. Muscular development must be appropriate—neither excessive nor insufficient—so it does not interfere with movement organization. These systems do not create motion; they either permit or restrict how much of gravity can be used.

This is why strength alone does not guarantee speed, and why excessive strength often works against efficient running. The issue is not power, but whether the system allows gravity to do its work.

Where Talent Actually Enters the Picture

Once the conceptual framework is clear and the same principles are available to everyone, differences in what is commonly called “talent” begin to shape the playing field. At that point, genetics have the final word.

Small, genetically influenced differences in sensation and perception affect how precisely a runner can feel balance, timing, and alignment. Combined with the state of development of the neuromuscular capacity, these differences determine how fully gravitational acceleration can be used. This is where large differences in efficiency, coordination, and apparent ease emerge—not because the principles are different, but because the capacities are.

Solving the Speed Problem

When you include the use of gravitational acceleration in the picture, the confusion resolves itself. Speed is not created by cadence. It is not created by stride length. Speed exists because a portion of gravity’s constant acceleration is being used, and cadence and stride length simply reflect that use.

The falling angle is not an addition to the speed formula. It is the condition that makes the formula meaningful at all.

Once runners stop trying to manipulate outcomes and instead learn how to organize movement so that more of the available gravitational acceleration can be consumed, speed improves in a stable and repeatable way. The effort does not disappear, but it becomes appropriate. The movement becomes clearer. And running begins to make sense as a skill, not a struggle.