The Myth and Truth of Cadence: 90 rpm Is Not a Law—Muscle Fibers and Race Stages Are What Matter

Where Does 90 rpm Come From, and Why Is It Misused

“Optimal cadence is 90 rpm” is almost a creed in the amateur cycling world, but it is an oversimplified slogan. The most efficient cadence is highly individual and context-dependent—it depends on muscle fiber composition, intensity, terrain, and fatigue state. There is no sacred number that fits everyone.

Factors Influencing Optimal Cadence

The Trade-off Between Metabolic Cost and Neuromuscular Cost

At a lower cadence, each pedal stroke carries a greater muscular load, relying more on muscle strength and glycogen; at a higher cadence, per-stroke force is smaller, but cardiovascular and neural recruitment costs rise. The optimal cadence is the intersection of these two costs, and that intersection shifts with the individual (muscle fibers), with intensity, and with fatigue. This is why pro riders’ self-selected cadences differ widely from one another, yet all are highly efficient.

The Race Stage Dictates Cadence, Not the Other Way Around

On steep climbs, gearing may force you into a low cadence with heavy pedaling; a long time trial may favor a slightly higher cadence to spread out muscular effort and preserve the legs; in the final seconds of a sprint, cadence spikes to extremely high values. Forcing a single cadence over an entire event is to ignore the physical realities of the stage. The smart approach is to let cadence serve “the metabolic and muscular management goals of the moment.”

Practical Principles for Cadence

• Don’t chase a sacred number; find your self-selected high-efficiency range at each intensity
• When steep climbs lack low gearing, heavy pedaling at low cadence is a reality that requires muscular support
• In long time trials, a slightly higher cadence can spread out per-stroke muscular force and delay localized muscle fatigue
• A natural drop in cadence when fatigued is a signal from your body; there is no need to force a high cadence

Connections to Other Topics

Cadence directly affects the rate of muscle glycogen depletion, and thus links to endurance (late-race fade) and carbohydrate strategies; in track events with fixed gearing, cadence is locked in by the gear ratio, becoming an irreversible pre-race decision (echoing the track cycling theme). It has never been an isolated number.

The popularity of “90 rpm is optimal” comes from the fact that it is easy to remember and easy to teach—yet that is precisely why it has misled countless people. The truth is far more mundane: optimal cadence is the dynamic outcome negotiated among your muscle fibers, the intensity of the moment, the gradient beneath your wheels, and the fatigue in your legs. Rather than worshipping a number, learn to listen, in different situations, to the cadence your body chooses on its own.

Related Reading

• The Effect of Cadence on Oxygen Consumption: Finding Your Optimal Cadence
• The Science of Cadence: Is 90 RPM Really Optimal?
• Small Gear High Cadence vs. Big Gear Low Cadence: The Scientific Choice for Climbing Cadence
• Optimizing Cycling Cadence: Science Finds Your Golden RPM