Abstract
A previous study found that the patellofemoral joint compressive force (PFJRF) during backward running was less than during forward running at a self-selected speed. Therefore, the purpose of this study was to compare the patellofemoral joint compressive forces during backward and forward running at the same speed. Ten runners (four females, six males) between the ages of 20–25 (X=22.25, SD=2.25) ran in backward and forward directions at a very slow speed of 2.3 mph (1.0 ms-1). Using a mathematical model of patellofemoral joint that does not assume equal forces of the quadriceps and patellar tendon, the PFJRFs during the very slow backward and forward running were calculated. Results showed that the PFJRF and knee extensor moment during backward and forward running were similar. The PFJRF and knee extensor moment were 3.51 BW and 144.52 Nm, respectively, during the very slow backward running, and 3.41 BW and 141.60 Nm, respectively, during the very slow forward running. In conclusion, slow backward and forward running put similar compressive forces on the patellofemoral joint. Moreover, backward running does not protect the patellofemoral joint from higher compression forces, but very slow speed does.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
