Plantar pressure distribution, rearfoot motion and ground reaction force after long distance running

'The objective of this study was to investigate ground reaction forces (GRF), rearfoot motion and plantar pressure distribution (PPD) variables before and after long distance treadmill running in a commercially available running shoe in a standardized laboratory condition. Sample was composed of 19 subjects of both genders. Data collection was performed in two phases: (1) physiological test, in order to determine the speed in which the long distance running protocol was performed and (2) biomechanical test: PPD, rearfoot motion and ground reaction force parameters were measured before and after a 45-min treadmill run. A paired sample 't-test' was used to compare the data between the pre and post-measurements (alpha = 0.05). The values of maximum pronation velocity showed a significant increase (P < 0.01). No significant changes were observed in the remaining parameters. There seem to be a hierarchical control of biomechanical parameters during long distance running, in which impact reduction is more important than the precise control of rearfoot motion.