The Effect of Running Speed on Cadence and Running Kinetics

Area of Science:

• Biomechanics
• Exercise Physiology
• Sports Medicine

Background:

• Lower running cadence (<170 steps/min) is linked to increased injury risk.
• The immediate effects of increased running speed on cadence and ground reaction forces in experienced runners remain understudied.

Purpose of the Study:

• To investigate the immediate impact of varying running speeds on running cadence and ground reaction forces.
• To analyze how experienced runners' biomechanics change with increased speed.

Main Methods:

• Cross-sectional study involving 30 experienced runners (21-49 years old).
• Subjects ran on an instrumented treadmill at seven predetermined speeds (2.68 m/s to 3.83 m/s).
• Cadence and ground reaction forces (peak vertical force, impact peak, loading rate, braking force, impulse) were measured.

Main Results:

• Mean running cadence increased significantly from 169 steps/min at 2.68 m/s to 178 steps/min at 3.83 m/s (p<0.001).
• All measured ground reaction force variables increased significantly with faster speeds (p<0.001).
• Stance time and step time decreased significantly as running speed increased (p<0.001).

Conclusions:

• Increased running speed leads to higher cadence and greater ground reaction forces in experienced runners.
• Faster running speeds are associated with reduced stance and step times.
• Findings provide insights into the biomechanical adaptations to increased running speed.