Biomechanical Assessment of Road Running: Self-Measurement of Cadence, Stride Length, and Vertical Oscillation

Introduction

Two runners with the same VO2max and the same training volume, yet their race times differ by more than 10 minutes—this scenario is not uncommon. The difference often lies in Running Economy, which is largely determined by biomechanical efficiency.

The good news: modern running watches and smartphones have made many biomechanical metrics—previously requiring laboratory equipment—easy to measure on the go. This article focuses on three of the most practical metrics: cadence, stride length, and vertical oscillation.

Metric 1: Cadence

What is Cadence?

Cadence is the total number of times both feet strike the ground per minute (Steps Per Minute, spm). Some devices measure per foot (steps per minute per leg); be sure to distinguish between the two.

How to Measure It?

Method 1: Automatic measurement with a watch
Most running watches from Garmin, COROS, Polar, and others have built-in cadence measurement. After your workout, you can view average cadence and real-time cadence charts in the app.

Method 2: Manual counting (no equipment needed)
Count the number of times one foot strikes the ground over 15 seconds while running, then multiply by 8 to get your cadence per minute (both feet combined).

Method 3: Metronome app
Use Metronome+ or a similar app to set a target cadence beat and practice syncing your rhythm to it.

Cadence Target Values

Running Scenario	Recommended Cadence Range
Easy run (Zone 1–2)	168–175 spm
Marathon pace	170–180 spm
Half marathon pace	175–185 spm
5km race pace	185–195 spm

“180 steps” is a commonly cited general recommendation, but research shows that optimal cadence varies with height, leg length, and speed. What matters is increasing your current cadence by 5–10%, rather than forcing a fixed number.

The Cost of Too-Low Cadence

Low cadence (< 168 spm) is usually accompanied by overstriding—the foot landing ahead of the center of mass, creating a braking force. This not only makes every step feel like hitting the brakes, but is also a common trigger for patellar pain and tibial stress syndrome.

Metric 2: Stride Length

What is Stride Length?

Stride length is the distance covered per “full stride” (one footfall of each foot), calculated as:

Stride length (meters) = Pace (meters/second) / (Cadence spm / 60)

Example: Pace 5:00/km (= 3.33 m/s), cadence 180 spm
Stride length = 3.33 / (180/60) = 3.33 / 3 = 1.11 meters

The Relationship Between Stride Length and Cadence

Pace = Cadence × Stride Length

This equation shows that to run faster, there are only two paths: increase cadence, or increase stride length (or both). For most intermediate runners, prioritizing cadence over stride length before reaching 170 spm is the safer strategy.

Forcibly increasing stride length often leads to overstriding, whereas increasing cadence encourages the foot to land closer to the center of mass, reducing impact.

Metric 3: Vertical Oscillation

What is Vertical Oscillation?

Vertical oscillation is the vertical displacement of your body (in centimeters) during each running step. The purpose of running is to move forward; any excess up-and-down bouncing is wasted energy.

How to Measure It?

Garmin’s HRM-Pro chest strap and Running Dynamics Pod can measure vertical oscillation directly. Some high-end watches (such as the Garmin Forerunner 965) also have built-in estimation features.

If you don’t have equipment, ask a friend to film you running from the side and observe the movement of the top of your head relative to the background—you can roughly judge with the naked eye whether the bouncing is excessive.

Vertical Oscillation Target Values

Runner Level	Vertical Oscillation (cm)
Beginner	10–14 cm
Intermediate	8–10 cm
Advanced	6–8 cm
Elite	< 6 cm

Vertical Ratio

Garmin’s “Vertical Ratio” = Vertical Oscillation / Stride Length, which provides a more standardized assessment of efficiency:

• < 8%: Excellent
• 8–10%: Good

• 10%: Room for improvement

Training Methods to Improve Biomechanics

Problem	Improvement Training
Cadence too low (< 170 spm)	Metronome training, short interval cadence-change drills
Vertical oscillation too high (> 10cm)	Core strengthening, reduce knee lift height, imagine “gliding forward”
Overstriding	Increase cadence, barefoot awareness training (light steps on grass)
Lateral pelvic sway	Gluteus medius strengthening (side-lying leg raises, banded crab walks)

Practical Advice

• Don’t fix all problems at once: Focus on one metric at a time, and evaluate improvement every 4–6 weeks
• Adjust cadence gradually: Increase by 5 spm at a time, giving your musculoskeletal system time to adapt (at least 6 weeks)
• Video analysis is the most cost-effective tool: Your phone’s slow-motion feature plus a side-angle recording can reveal issues the watch can’t see
• Hill training is a shortcut to improving cadence: Running uphill naturally forces a higher cadence and shorter stride, making it an excellent way to train high cadence

Conclusion

Running is not just a contest of physical endurance; it is also an art of efficiency. Cadence, stride length, and vertical oscillation are three technical levers that let you convert the same physical effort into faster speed. Start recording these three numbers today, and a year from now you’ll see a noticeable difference.

Related Reading

• Running Biomechanics: The Relationship Between Cadence, Stride Length, and Energy Efficiency
• In-Depth Analysis of Running Efficiency: The Scientific Relationship Between Vertical Oscillation, Ground Contact Time, and Running Economy
• Optimizing Running Cadence and Stride Length: The Science of Improving Running Economy
• Cadence vs. Stride Length: Which Has a Greater Impact on Running Speed?