Abstract：
:The optimum pre-flight characteristics of the Hecht and handspring somersault vaults were determined using a two-segment simulation model. The model consisted of an arm segment and a body segment connected by a frictionless pin joint, simulating the vault from the Reuther board take-off through to landing. During horse contact, shoulder torque was set to zero in the model. Five independent pre-flight variables were varied over realistic ranges and an objective function was maximized to find the optimum pre-flight for each vault. The Hecht vault required a low trajectory of the mass centre during pre-flight, with a low vertical velocity of the mass centre and a low angular velocity of the body at horse contact. In contrast, the optimum handspring somersault required a high pre-flight trajectory, with a high angular velocity of the body and a high vertical velocity at horse contact. Despite the simplicity of the model, the optimum pre-flights were similar to those used in competitive performances.
journal_name
J Sports Scijournal_title
Journal of sports sciencesauthors
King MA,Yeadon MR,Kerwin DGdoi
10.1080/026404199366028subject
Has Abstractpub_date
1999-04-01 00:00:00pages
313-24issue
4eissn
0264-0414issn
1466-447Xjournal_volume
17pub_type
杂志文章abstract：:Low-intensity exercise with blood flow restriction (BFR) is an increasingly common method of improving muscular strength and hypertrophy, and improving aerobic fitness, in clinical and athletic populations. The aim of this systematic review was to describe common approaches to determining occlusion pressures for BFR e...
journal_title：Journal of sports sciences
pub_type： 杂志文章
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更新日期：2020-11-01 00:00:00
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journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
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更新日期：2019-08-01 00:00:00
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journal_title：Journal of sports sciences
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pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
pub_type： 杂志文章,随机对照试验
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journal_title：Journal of sports sciences
pub_type： 杂志文章
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更新日期：1994-07-01 00:00:00
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