DOES FATIGUE AFFECT THE KINEMATICS OF ENDURANCE RUNNING?

The purpose of this study was to determine the foot strike pattern (FSP), inversion (INV) and spatial-temporal variables in a large sample of recreational runners during a long-distance competition, according to sex and changes in the classification race. A total of 368 men and 67 women, who participated in the XVII International Half Marathon of Cordoba (Spain) were analysed. It was recorded at km 5 and km 15, where high-speed camcorder and 2D-photogrammetric techniques were used to measure FSP, INV, contact time (CT) and flight time (FT). The group that worsened their classification at km 15 increase RFS prevalence and INV asymmetry. A Pearson analysis indicates that variation of the classification in the race between the marks km 5 and km 15 is related with CT (r=0.429, p<0.001) and FT (r=-0.360, p<0.001). RFS prevalence and spatial -temporal parameters showed different patterns depending on whether the runners improved or worsened their ranking.

Automated summary

The study aimed to analyze the foot strike pattern, inversion, and spatial-temporal variables in recreational runners during a long-distance competition according to sex and changes in the race. The researchers analyzed 368 men and 67 women who participated in the XVII International Half Marathon of Cordoba, Spain. The results showed that runners who performed poorly at km 15 had a higher prevalence of rearfoot strike pattern and inversion asymmetry. The variation in race classification between km 5 and km 15 was found to be related to contact time and flight time.