Abstract：
:This study investigates the effect of running shoes' aging on mechanical and biomechanical parameters as a function of midsole materials (viscous, intermediate, elastic) and ground inclination. To this aim, heel area of the shoe (under calcaneal tuberosity) was first mechanically aged at realistic frequency and impact magnitudes based on a 660 km training plan. Stiffness (ST) and viscosity were then measured on both aged and matching new shoes, and repercussions on biomechanical variables (joint kinematics, muscular pre-activation, vertical ground reaction force and tibial acceleration) were assessed during a leg-extended stepping-down task designed to mimic the characteristics of running impacts. Shoes' aging led to increased ST (means: from 127 to 154 N ∙ mm(-1)) and decreased energy dissipation (viscosity) (means: from 2.19 to 1.88 J). The effects induced by mechanical changes on body kinematics were very small. However, they led with the elastic shoe to increased vastus lateralis pre-activation, tibial acceleration peak (means: from 4.5 g to 5.2 g) and rate. Among the three shoes tested, the shoe with intermediate midsole foam provided the best compromise between viscosity and elasticity. The optimum balance remains to be found for the design of shoes regarding at once cushioning, durability and injury prevention.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
Chambon N,Sevrez V,Ly QH,Guéguen N,Berton E,Rao Gdoi
10.1080/02640414.2014.886127subject
Has Abstractpub_date
2014-01-01 00:00:00pages
1013-22issue
11eissn
0264-0414issn
1466-447Xjournal_volume
32pub_type
杂志文章abstract：:This study used a quasi-applied research model to identify and develop potentially talented female soccer players. Athletes aged 15-19 years with a background in team ball sports or athletics were targeted for recruitment using advertisements and promotions through various media. Interested athletes attended a 2-day p...
journal_title：Journal of sports sciences
pub_type： 杂志文章
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journal_title：Journal of sports sciences
pub_type： 杂志文章
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
pub_type： 临床试验,杂志文章
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journal_title：Journal of sports sciences
pub_type： 临床试验,杂志文章,随机对照试验
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journal_title：Journal of sports sciences
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journal_title：Journal of sports sciences
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