Investigation of marker placement schemes for determining rearfoot motion

[摘要] Twelve female recreational runners (mean age = 24.5 yrs.)volunteered as Ss to determine whether there weredifferences in the measurement of rearfoot motion when using three different marker placement schemes during conditionsof slow and fast running. Measurement of rearfoot motionconsisted of touchdown angle (TA), maximum pronation angle(MPA), and time to maximum pronation (TMP). Ss were filmedrunning on a treadmill operating at speeds of 3.58 and 2.44m/s at a 0% grade. The film was transferred to videotapeand the ARIEL (APAS) system was used to create a 2-dimensional image of each S while running. A 2-way ANOVAwith repeated measures (p < .05) was used to test thehypothesis. Results of the TA indicated significantdifferences between Schemes 1 and 2 and Schemes 2 and 3 forboth slow and fast running conditions. Results of the MPAindicated significant differences between Schemes 1 and 2and Schemes 2 and 3 for the slow running condition, andbetween Schemes 2 and 3 for the fast running condition. Itappeared that markers placed on the Achilles tendon and thegastrocnemius muscle changed the mechanical axis of thelower leg and significantly influenced the measurement ofrearfoot motion. Markers placed exclusively on soft tissueas in Scheme 1 appeared to move equally with similarrearfoot motion measurements as when markers placed on bonylandmarks were used.

[发布机构] University of Wisconsin

[效力级别] Running shoes - Design

[关键词] Running injuries - Prevention;Running shoes - Design;Biomechanics;Kinematics