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3D Kinematic Hip, Knee and Rearfoot Comparison of Overground and Treadmill Running: 828June 1 8:15 AM - 8:30 AM

Fellin, Rebecca; Barrios, Joaquin; Davis, Irene S. FACSM

Medicine & Science in Sports & Exercise: May 2007 - Volume 39 - Issue 5 - p S72
doi: 10.1249/
E-17 Free Communication/Slide - Running Mechanics: JUNE 1, 2007 8:00 AM - 10:00 AM ROOM: 263

University of Delaware, Newark, DE.


Gait analyses are performed using both treadmill and overground modes of running. This led researchers to question whether mechanics are similar between the two modes. Studies examining 2D motion of the knee and rearfoot suggest that the mechanics are similar. However, no studies have examined 3D hip, knee and rearfoot motion between the two modes of running.

PURPOSE: To compare 3D kinematics of hip, knee and rearfoot between overground and treadmill running.

METHODS: This study is ongoing, and we have collected five trials each of overground and treadmill running at 3.35 m/s utilizing a VICON motion analysis system for five recreational runners. These include two females and three males, 31.8 ± 7.1 years, who run at least 10 miles/week. Right limb peak stance kinematic variables were determined using customized Lab VIEW software. Heel strike was denned as the maximum anterior difference, during a stride, between the distal heel marker and the sacrum marker. Toe off was denned as the minimal posterior difference, during a stride, between the second metatarsal head marker and the sacrum marker.

RESUITS: Preliminary data suggested the motion patterns were very similar between the two modes of running. Additionally, peak variables were similar with the differences ranging between 0.1 and 2.3 degrees and the mean difference being 1.3 ±

Table 1

Table 1

CONCLUSION: Based on these preliminary results it appears that treadmill running is a good representation of overground running.

© 2007 American College of Sports Medicine