Introduction: Foot anthropometry data is important for sports footwear design. An athlete in particular may have specific configuration of a foot for doing effective force output. The purpose of this study was to evaluate to foot shape obtained from 3D foot scanning anthropometry and to describe anthropometric characteristics in foot shape for sprinter. Methods: The subjects were twenty Japanese college sprinter (100m; 6 sprinters, age:19.6±1.24years, body height: 172.9±3.9cm, body mass: 69.6±6.2kg, 100m time: 11.0±0.33sec, 200m; 5 sprinters, age: 19.8±0.7years, body height: 174.9±6.2cm, body mass: 68.3±5.1kg, 200m: time: 22.9±0.44sec, 400m; 9 sprinters, age: 20.3±0.6years, body height: 174.3±6.0cm, body mass: 66.4±7.1kg, 400m time: 49.6±1.53sec) and 15 non-athletes (age: 20.5±2.3years, body height: 172.6±5.8cm, body mass: 64.1±9.1kg). Foot anthropometry was measured by using three dimensional whole foot scanner (INFOOT: I-Ware Laboratory Co.Ltd). Barefoot subjects standing upright with both feet apart 15-20cm, and weight distributed equally on both feet. Whole foot scanning data was analysis according to refer the preliminary research in Kouchi, 1998[1]. Ankle to metatarsal head length (AML) was calculated from ankle joint center of medial malleolus to lateral malleolus rand mark points and metatarsal midpoint was calculated from first metatarsal to fifth metatarsal rand mark points. Horizontal distance (heel to ankle length: HAL) between ankle joint center and heel and the ratio of HAL for AML (HAL/AML) were also calculated. Foot anthropometry data were normalized as foot length. Results: and discussion Foot anthropometry data was not significantly different by comparing sprinters with non-athletes. However, Sprinter had significantly longer AML and % AML was compared to non-athletes (AML: 133±6mm vs. 127±6mm, p<0.01, % AML: 52±2% vs. 50±1%, p<0.01). In addition, sprinter`s HAL/ AML was smaller than non-athletes (0.38±0.33 vs. 0.40±0.33, p<0.05). In particular, 100m sprinter showed a tendency to show large % AML compared to other sprinters (200m, 400m) and non-athletes. These results suggest that long AML which might be external moment arm larger and advantage gear ratio in efficient foot for explosive force output were characterized as beneficial foot shape in sprinters. Conclusions: It was concluded that sprinters had a foot anthropometric characteristics in long AML, which might be efficient foot for explosive force output for sprint performance
© Copyright 2014 19th Annual Congress of the European College of Sport Science (ECSS), Amsterdam, 2. - 5. July 2014. Veröffentlicht von VU University Amsterdam. Alle Rechte vorbehalten.