نتایج جستجو برای: dynamic stretching

تعداد نتایج: 421382  

Journal: :International journal of sports physical therapy 2012
Phil Page

Stretching is a common activity used by athletes, older adults, rehabilitation patients, and anyone participating in a fitness program. While the benefits of stretching are known, controversy remains about the best type of stretching for a particular goal or outcome. The purpose of this clinical commentary is to discuss the current concepts of muscle stretching interventions and summarize the e...

Journal: :Physical review letters 2009
Alfredo Alexander-Katz Hirofumi Wada Roland R Netz

The stretching response of a single collapsed homopolymer is studied using Brownian dynamic simulations. The irreversibly dissipated work is found to be dominated by internal friction effects below the collapse temperature, and the internal viscosity grows exponentially with the effective cohesive strength between monomers. These results explain friction effects of globular DNA and are relevant...

Journal: :علوم زیستی ورزشی 0
مرتضی سنگدوینی کارشناس ارشد فیزیولوژی ورزشی دانشگاه گلستان بهمن میرزایی دانشیار دانشگاه گیلان علی مصطفی لو کارشناس ارشد آسیب شناسی ورزشی دانشگاه آزاد اسلامی واحد مینودشت احسان سعیدی کارشناس ارشد فیزیولوژی ورزشی

the purpose of the present study was to investigate whether duration of static stretching could affect the maximal voluntary contraction (mvc) and flexibility of hamstring muscles. 10 male physical education students randomly performed three warm-up protocols on different days. the protocols included: a) five minutes of treadmill run and 45 seconds (3×15 seconds) of static stretching of hamstri...

2011
Hiroshi Kurazumi Masayuki Kubo Mako Ohshima Yumi Yamamoto Yoshihiro Takemoto Ryo Suzuki Shigeru Ikenaga Akihito Mikamo Koichi Udo Kimikazu Hamano Tao-Sheng Li

Stem cell therapies have been clinically employed to repair the injured heart, and cardiac stem cells are thought to be one of the most potent stem cell candidates. The beating heart is characterized by dynamic mechanical stresses, which may have a significant impact on stem cell therapy. The purpose of this study is to investigate how mechanical stress affects the growth and differentiation of...

Journal: :journal of family and reproductive health 0
farideh vaziri department of midwifery, school of nursing and midwifery, shiraz university of medical sciences, shiraz, iran. azam hoseini department of midwifery, school of nursing and midwifery, shiraz university of medical sciences, shiraz, iran. farahnaz kamali department of midwifery, school of nursing and midwifery, bushehr university of medical sciences, bushehr, iran. khadijeh abdali department of midwifery, school of nursing and midwifery, shiraz university of medical sciences, shiraz, iran. mohamadjavad hadianfard department of physical medicine and rehabilitation, medical school, shiraz university of medical sciences, shiraz, iran. mehrab sayadi health policy research center, shiraz university of medical sciences, shiraz, iran.

objective: to compare the effects of aerobic and stretching exercises on severity of primary dysmenorrhea. materials and methods: this randomized clinical trial was conducted on 105 female students who were suffering from primary dysmenorrhea. the participants were divided into aerobic exercise, stretching exercise, and control groups. the two intervention groups did the exercises three times a...

The present study deals with the analysis of the effects of radiative heat transfer of micropolar fluid flow over a porous and stretching sheet in the presence of magnetic field. The dynamic viscosity and thermal conductivity coefficient have formulated by temperature-dependent relations to obtain more exact results. The flow is supposed two-dimensional, incompressible, steady and laminar and t...

1997
John Kelsey Bruce Schneier Chris Hall David A. Wagner

We introduce the notion of key stretching, a mechanism to convert short s-bit keys into longer keys, such that the complexity required to brute-force search a s+ t-bit keyspace is the same as the time required to brute-force search a s-bit key stretched by t bits.

Journal: :Journal of bodywork and movement therapies 2008
Dimitrios Kostopoulos Konstantine Rizopoulos

OBJECTIVES The purpose of this study was to examine the effects of the use of a vapocoolant blend of pentafluoropropane and tetrafluoroethane (Gebauer's Spray and Stretch) on hip flexion stretching. METHODS Thirty volunteers were randomly assigned to spray and stretch treatment and stretch only control groups. Each group was assessed pre- and posttest on passive and active hip flexion range o...

2008
Erik A. Kneller Peter E. van Keken

[1] Shear-wave splitting observations from many subduction zones show complex patterns of seismic anisotropy that commonly have trench-parallel fast directions. Three-dimensional flow may give rise to trench-parallel stretching and provide an explanation for these patterns of seismic anisotropy. Along-strike variations in slab geometry produce trench-parallel pressure gradients and are therefor...

Journal: :The journal of physical chemistry. B 2008
Bingjie Sun Qiu Jin Lisha Tan Peiyi Wu Feng Yan

The mixture of ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate, bmimBF4) and water (2.5%, molar fraction) under isothermal conditions at 80 degrees C was investigated by FTIR spectroscopy and two-dimensional correlation infrared spectroscopy (2D-IR) methods. Three regions were focused: the OH stretching band of water (3755-3300 cm (-1)), the stretching band of CH on the imidazole ri...

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