نتایج جستجو برای: pennation angle

تعداد نتایج: 130564  

Journal: :Journal of physiological anthropology and applied human science 2001
T Abe S Fukashiro Y Harada K Kawamoto

The purpose of this study was to investigate the relationship between sprint performance and architectural characteristics of leg muscles in 26 female 100-m sprinters. Pennation angle and muscle thickness of the vastus lateralis (VL) and gastrocnemius medialis (GM) and lateralis (GL) muscles were measured by B-mode ultrasonography, and fascicle length was estimated. Sprinters had a significantl...

2016
Maria Stella Valle Antonino Casabona Marco Micale Matteo Cioni

This study was designed to measure in vivo muscle architecture of the rectus femoris in adults with Down syndrome, testing possible relationships with functional parameters of the knee motion. Ten adults with Down syndrome and ten typically developed participated in the study. Pennation angle and thickness of the rectus femoris and subcutaneous layer of the thigh were measured via ultrasound im...

2014
John W. Ramsay Thomas S. Buchanan Jill S. Higginson

Poststroke plantar flexor muscle weakness has been attributed to muscle atrophy and impaired activation, which cannot collectively explain the limitations in force-generating capability of the entire muscle group. It is of interest whether changes in poststroke plantar flexor muscle fascicle length and pennation angle influence the individual force-generating capability and whether plantar flex...

Journal: :Journal of foot and ankle research 2015
Maria Ruiz Muñoz Manuel González-Sánchez Antonio I Cuesta-Vargas

BACKGROUND The purpose of the present study is to establish the relationship and degree of contribution between torque and sonomiography variables (pennation angle - muscle thickness), and electromyography variables (EMGAreaUnderCurve - EMGMaximalPeak) of the tibialis anterior muscle during (TA) maximal and relative isometric foot dorsiflexion (IFD). Secondary aim: To determine the measurement'...

Journal: :International journal of physiology, nutrition and physical education 2022

The purpose of this research was to ascertain the relationship between architectures lower body muscles and lunges performance. Thirty recreationally active, untrained males (mean age: 17±1.25 years) were recruited participated in two testing sessions: anthropometrics muscle architecture, one-repetition maximum (RM) test. B-mode ultrasonography used assess thickness, pennation angle, fascicle l...

Journal: :Journal of applied biomechanics 2011
Markus Tilp Simon Steib Gudrun Schappacher-Tilp Walter Herzog

Force enhancement following muscle stretching and force depression following muscle shortening are well-accepted properties of skeletal muscle contraction. However, the factors contributing to force enhancement/depression remain a matter of debate. In addition to factors on the fiber or sarcomere level, fiber length and angle of pennation affect the force during voluntary isometric contractions...

Journal: :Journal of morphology 1994
T J Burkholder B Fingado S Baron R L Lieber

Skeletal muscle fiber and architectural properties both contribute to the functional behavior of a muscle. This study uses discriminant analysis and mathematical modeling to identify the structurally and functionally significant properties. The architectural properties of fiber length, muscle length, and pennation angle are found to be the most structurally significant parameters, whereas fiber...

Journal: :Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2014
Niklas König Michael Cassel Konstantina Intziegianni Frank Mayer

OBJECTIVES Sonography of muscle architecture provides physicians and researchers with information about muscle function and muscle-related disorders. Inter-rater reliability is a crucial parameter in daily clinical routines. The aim of this study was to assess the inter-rater reliability of sonographic muscle architecture assessments and quantification of errors that arise from inconsistent pro...

2016
Eleftherios Kellis Nikiforos Galanis Chrysanthos Chrysanthou Nikolaos Kofotolis

This study examined the use of ultrasound to monitor changes in the long head of the biceps femoris (BF) architecture of aprofessional soccer player with acute first-time hamstring strain. The player followed a 14 session physiotherapy treatment until return to sport. The pennation angle and aponeurosis strain of the long head of the biceps femoris (BF) were monitored at 6 occasions (up until 1...

Journal: :Journal of applied physiology 2009
C Suetta L G Hvid L Justesen U Christensen K Neergaard L Simonsen N Ortenblad S P Magnusson M Kjaer P Aagaard

Inactivity is a recognized compounding factor in sarcopenia and muscle weakness in old age. However, while the negative effects of unloading on skeletal muscle in young individuals are well elucidated, only little is known about the consequence of immobilization and the regenerative capacity in elderly individuals. Thus the aim of this study was to examine the effect of aging on changes in musc...

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