Award Date
5-1-2016
Degree Type
Dissertation
Degree Name
Doctor of Physical Therapy (DPT)
Department
Physical Therapy
Advisor 1
Szu-Ping Lee
First Committee Member
Merrill Landers
Second Committee Member
Kai-Yu Ho
Number of Pages
20
Abstract
Background and purpose: Running is one of the most popular exercises but it is also an activity with a high incidence of injury. Running form modification involving a forward lean of the trunk and forefoot strike pattern has been shown to be effective in attenuating the impact forces of the lower extremity. However, it is currently unknown how these changes can be most effectively instructed and learned by the runners. Previous studies have shown that practicing a motor task with an external focus can facilitate learning and retention when compared to the more common internal focus instructions. The purpose of this study is to examine the effectiveness of external and internal attentional focus cues on trunk posture and peak vertical ground reaction force (GRF) during the stance phase of running. Subjects and Methods: Ten recreational runners were selected for this study and randomly assigned tone of two groups receiving external or internal instructions designed to modify their running form. Trunk posture and GRF were obtained using a 3D motion capture system and a force plate instrumented treadmill while running at 2.5 m/s and a self-selected speed. Subjects were tested over a 5-week time period consisting of 4 sessions over a 4-week training program, followed by a final session 1 week after the training program to analyze retention of running form modification. Results: Overall there was a significant increase in trunk angle observed over time, following instruction, for both groups at speed 2.5 m/s. Running at speeds 2.5 m/s and a self-selected speed showed no statistically significant difference in increased trunk angle or GRF when comparing an internal versus external attentional focus. Conclusion: Simple postural instructions were shown to be effective for inducing greater trunk lean during running. This study found no difference in trunk angle or GRF when comparing internal and external attentional focus groups. Future studies would benefit from using clear and proper instructions that incorporate internal and external attentional focus cues with feedback to reinforce motor learning.
Keywords
Running posture; ground reaction force; forefoot running; rear foot running; chi running, trunk angle, trunk posture, running form, vicon, EMG, running, attentional focus cue, external focus, internal focus
Disciplines
Physical Therapy
File Format
File Size
459 Kb
Degree Grantor
University of Nevada, Las Vegas
Language
English
Repository Citation
Billington, Elizabeth; Devries, Scott; and Scoggin, Kenshin, "Effects of Simple Postural Instructions on Running Form Modification in Recreational Runners – Preliminary Findings" (2016). UNLV Theses, Dissertations, Professional Papers, and Capstones. 3538.
http://dx.doi.org/10.34917/14871582
Rights
IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/