Abstract des Autors

This study was performed to analyze the influence of midsole hardness and thickness of marathon shoes on pressure distribution, rear foot stability and shock absorption during marathon running in order to find out the optimal midsole hardness and thickness of marathon shoes suitable for korean marathon runners. The subject employed on this study were 11 male marathoners. Midsole hardness of marathon shoes were 53ø, 56ø, 59ø, 62ø, 65ø and thickness were 17 mm, 19 mm, 21 mm. The marathon running motion at speed of 5.3 m/sec were measured using a EMED pressure measurement mat, a AMTI force platform and a photosonic 16 mm high speed movie camera. The findings of the study were as follows: 1. Maximal vertical ground reaction force appeared to be 2.72 B.W. and not influenced by midsole hardness and thickness. 2. Maximal impact force appeared to be 1.7 B.W. and not influenced by midsole hardness and thickness. 3. Midsole hardness and thickness did not influence the maximal vertical ground reaction force and impact force loading rate. 4. Midsole hardness and thickness did not influence the initial achilles tendon angle, initial rearfoot angle, total angualr displacement of achilles tendon angle, but midsole hardness influenced the initial angular displacement of achilles tendon angle (p < 0.05). 5. Regional peak pressure and instant of peak pressure except for midfoot region appeared higher at medial regions than at lateral regions. Verf.-Referat