Quantitative analysis of plantar load distribution with comparison to ground reaction force during take-off phase in vertical jump movement
10.7600/jspfsm.61.351
- VernacularTitle:垂直跳び踏み切り動作中の足底荷重分布定量化の試み
- Author:
Yu Kashiwagi
;
Kazuo Funato
- Publication Type:Journal Article
- Keywords:
plantar load;
ground reaction force;
vertical jump
- From:Japanese Journal of Physical Fitness and Sports Medicine
2012;61(3):351-363
- CountryJapan
- Language:English
-
Abstract:
In order to quantify the plantar load distribution during dynamic human movement, integrated system consisted of a pressure plate, motion capture system and a force platform was constructed and examined its accuracy and validity based on foot anatomical measurement points during take-off phase in vertical jump. Foot Scan (Rs Scan,200Hz), VICON (Oxford,100Hz) and Force plate (Kistler,1KHz) were systematically synchronized as to identify each sub-area of plantar from anatomical measurement points on foot. Each five sub-area of plantar was determined by using the methods of Stebbins et al. (2005). Accuracy and validity of plantar load and the position of center of pressure (COP) were examined by % Difference and RMS error with comparison to those obtained from Force plate, Foot Scan and VICON coordinate system. Using this system, twelve subjects performed maximum counter movement vertical jump and instantaneous plantar load changes for each of five sub-area were quantified during weighing phase during take-off. % Differences in plantar load value between Force plate and Foot Scan were less than 2.3 ± 1.5 % as well as RMS errors of COP’s position were ranged from 1.5 - 8.9 mm. Medial forefoot plantar load fairly contributed to Force plate data and peak value of plantar load in each sub-area appeared as order from Heel, Lateral forefoot and Medial forefoot. This newly developed system could quantify each plantar sub-area load with both enough accuracy and validity and also demonstrate instantaneous each sub-area’s plantar load pattern during dynamic movement such as take-off phase in vertical jump.
