By P.K. Daniel
Dynamic measures of arch height in runners are significantly different from static measures, according to research from Brigham Young University in Provo, UT.
The investigators assessed 16 healthy college-aged runners, who ran an average of 15 to 30 miles per week. Arch height was assessed using the Oxford Foot Model with the participants barefoot, first while standing on a treadmill and then while jogging; the dynamic measurement was taken at the point of peak knee flexion.
The mean arch height for the group was 16.2 ± 4.6 mm for the static trial and 13.7 ± 5.2 mm for dynamic trial. In 13 runners, dynamic arch height on average was more than 25% lower than static arch height, which researchers had predicted, given that ground reaction forces during running are twice those of standing. But in three runners–all midfoot or forefoot strikers–dynamic arch height was 5.53% to 54.03% greater than static arch height, likely due to increased activation of the intrinsic foot muscles and/or the windlass mechanism. The findings were presented in May at the ACSM meeting.
Olsen MT, Griffin DB, Seabrook KE, et al. Comparing static and dynamic arch height during running using the Oxford Foot Model. Med Sci Sports Exerc 2015;46(5 Suppl);S595.