Description
Objectives*1. To evaluate the impact of step frequency manipulation (±3% and ±6% of baseline) on running kinematics,
including step length and time.
2. To analyze running stability under different feedback modalities (auditory and visual) using the Goal
Equivalent Manifold (GEM) method.
3. To assess the variability in running kinematics during baseline and manipulated step frequency trials.
4. To explore the relationship between heart rate responses and changes in running stability and kinematics.
5. To investigate potential implications of step frequency manipulation on running economy and physiological effort.
Materials and Methods
Twenty trained/recreational runners (10 male, 10 female) completed 13 treadmill trials, 2 minutes each, at 12
km/h and a 1% slope. Baseline kinematics were established from two initial runs without feedback. Participants
then completed trials with auditory (metronome) and visual (on-screen) feedback while matching their step frequency to predetermined targets: ±3% and ±6% of their baseline frequency. All feedback was right-leg specific,
and participants were not informed of the frequency adjustments. Running kinematics, including step length
and time, were recorded using the OptoJump Next system, and heart rate was monitored throughout. Stability
was assessed using the Goal Equivalent Manifold (GEM) method, while kinematic variability and physiological
responses were analyzed with descriptive and inferential statistics.
Results
Preliminary analyses using repeated-measures ANOVA suggest significant differences in kinematic variability and stability between baseline and manipulated step frequencies. Visual feedback trials showed greater
variability compared to auditory feedback, with larger deviations observed at ±6% frequencies. Heart rate
responses correlated with step frequency deviations, indicating increased physiological effort with larger frequency changes.
Conclusions
Step frequency manipulation significantly affects running stability and kinematics, with distinct responses to
auditory and visual feedback modalities. These findings provide valuable insights into optimizing running mechanics, feedback strategies, and physiological efficiency. Future research should explore these outcomes in
broader populations and extended running conditions to enhance training and rehabilitation applications.
| Period | 26 Mar 2025 |
|---|---|
| Event title | RSU Research week 2025 |
| Event type | Conference |
| Organiser | Rīga Stradiņš University |
| Location | Rīga, LatviaShow on map |
| Degree of Recognition | International |
Keywords
- Running biomechanics
- Motor control