This study aimed to explore the distribution pattern of shoelaces tension in different positions under different shoelaces tightness during running.It would provide data support to design automatic shoe-laces tightening system for running shoes.A three-dimensional motion capture system and a self-developed miniature shoelace tensile testing system were used to collect the shoelace tension force.Fifteen male run-ners participated in this study.Shoelace tension forces in different positions(front/middle/rear)were col-lected when running at 3.8 m/s speed under different conditions(loose/comfortable/tight).Results showed that the peak shoelace tension of the front shoelace was greater than that of the front and middle(P<0.05)when the shoelace was loose and tight.At the loose state,the peak tension force of the front,middle,and rear shoelace appeared in the gait cycle of(49.4±14.6)%,(47.6±9.9)%,and(38.7±16.7)%,respectively.The peak tension force of the front shoelace appeared in(29.1±11.8)%and(25.7±6.6)%;the middle shoelace appeared in(48.2±9.2)%and(48.5±12.1)%;and that of the rear shoelace appeared in(40.8±18.9)%and(43.4±15.7)%of the gait cycle when the shoe-lace was in the state of comfort and tight.The shoelace tension changed regularly with each period of the gait cycle during running,and the rear shoelace tension force was the largest.It is suggested that the re-gional design of shoelaces should be carried out when designing running shoes to improve the comfortable-ness and running performance of the athlete.
running shoestightness of shoelacesshoelace tensionautomatic lacing device