NCT06988709

Examining the Most Effective Method to Reduce Running Ground Contact Time

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Keller Army Community Hospital · Federal
• Sex: All
• Age: 17 Years – 60 Years
• Healthy volunteers: Accepted

Summary

The purpose of our study is to establish the most effective running retraining technique to decrease ground contact time. This will be investigated by applying three running retraining conditions and assessing the change in ground contact time and other biomechanical variables between the runner's baseline running and each retraining technique.

Detailed description

The purpose of our study is to establish the most effective running retraining technique to decrease ground contact time utilizing three common running retraining methods in healthy runners. The first aim will be to apply three running retraining conditions and assess the change in ground contact time and other spatiotemporal and biomechanical variables between the runner's baseline running and each retraining condition. The three running conditions will be at the participant's self-selected speed corresponding to "a comfortable run for 30 minutes". The conditions will be, condition 1: a verbal cue to "pull your foot off the ground as quickly as you can," condition 2: a metronome set to 10% above their preferred cadence found during the baseline run, and condition 3: visual feedback to reduce their ground contact time through observing that number in real time provided by a commercial IMU. The participant will attempt to lower that to 5% below their baseline run ground contact time by being given that target number on a sheet of paper. The second aim will be to examine the effect of the 3 running conditions on the runner's level of exertion and difficulty using the Omni Rate of Perceived Exertional Scale, the Rate of Perceived Difficulty, and ranking the techniques from 1 to 3 on which they felt was most natural. We hypothesize that each method will reduce ground contact time, but condition 3 providing continuous visual feedback will result in the most consistent decrease to ground contact time across the runners and will be perceived as the easiest to perform. Overall, this study will provide clinicians with a running retraining intervention that has been objectively shown to decrease ground contact time and provide researchers with a method to further investigate its effect on running injuries.

Conditions

• Healthy Runners

Interventions

Type	Name	Description
OTHER	Real-time Visual Feedback	Runners will visualize their real-time ground contact time (GCT) measured by the RunScribe on a TV screen. They will be instructed to run with a goal of matching their target GCT. Their target GCT will be 5% less than their baseline.
OTHER	Real-time Auditory Feedback	Runners will be instructed to match their step rate to a target step rate, 10% above their baseline step rate. A metronome will be played over a speaker to provide real-time auditory feedback of the target step rate.
OTHER	Real-time Verbal Feedback	The clinician will provide real-time verbal feedback to runner to "pull your foot off the ground as quickly as you can," every 15 seconds during the retraining condition.

Timeline

• Start date: 2025-05-01
• Primary completion: 2026-12-01
• Completion: 2026-12-01
• First posted: 2025-05-25
• Last updated: 2025-12-12

Locations

1 site across 1 country: United States