Results 31 to 40 of about 1,978,723 (197)

Determinants of hamstring fascicle length in professional rugby league athletes

Journal of Science and Medicine in Sport, 2020
Investigate the determinants of hamstring fascicle length in professional rugby league players.Retrospective cohort study METHODS: Thirty-three elite male athletes underwent testing in the pre-season and in-season periods. Fascicle length measurements of the biceps femoris long head, 3D kinematics and elapsed time-periods at thigh angular velocities ...
Timothy M. McGrath, Billy T. Hulin, Nathan Pickworth, Alex Clarke, Ryan G. Timmins   +4 more
openaire   +3 more sources

Does acute passive stretching increase muscle length in children with cerebral palsy? [PDF]

, 2013
This article has been made available through the Brunel Open Access Publishing Fund. Copyright @ The Authors. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use ...
Theis, Nicola, Amir A. Mohagheghi, Mohagheghi, AA, Korff, Thomas, Thomas Korff, Nicola Theis, Korff, T, Kairon, H, Mohagheghi, Amir A., Mohagheghi, Amir A, Harvey Kairon, Kairon, Harvey, Theis, N, Hoenshell, Brittney   +13 more
core   +1 more source

Association between medial gastrocnemius muscle-tendon unit architecture and ankle dorsiflexion range of motion with and without consideration of slack angle.

PLoS ONE, 2021
Joint flexibility is theoretically considered to associate with muscle-tendon unit (MTU) architecture. However, this potential association has not been experimentally demonstrated in humans in vivo.
Kosuke Hirata, Hiroaki Kanehisa, Naokazu Miyamoto   +2 more
doaj   +1 more source

Ultrasonographic measurements of fascicle length overestimate adaptations in serial sarcomere number

Experimental Physiology, 2023
Abstract Ultrasound-derived measurements of muscle fascicle length (FL) are often used to infer increases (chronic stretch or training) or decreases (muscle disuse or aging) in serial sarcomere number (SSN). Whether FL adaptations measured via ultrasound can truly approximate SSN adaptations has not been investigated.
Avery Hinks, Martino V. Franchi, Geoffrey A. Power   +2 more
openaire   +3 more sources

Passive elongation of muscle fascicles in human muscles with short and long tendons

Physiological Reports, 2017
This study tested the hypothesis that the ratio of changes in muscle fascicle and tendon length that occurs with joint movement scales linearly with the ratio of the slack lengths of the muscle fascicles and tendons.
Jeanette M. Thom, Joanna Diong, Peter W. Stubbs, Robert D. Herbert   +3 more
doaj   +1 more source

Ultrasound-derived Biceps Femoris Long Head Fascicle Length: Extrapolation Pitfalls [PDF]

Medicine & Science in Sports & Exercise, 2019
ABSTRACT Purpose This study aimed to compare biceps femoris long head (BFlh) fascicle length (Lf) obtained with different ultrasound-based approaches: 1) single ultrasound images and linear Lf extrapolation, 2) single ultrasound images and one of two different trigonometric equations (termed equations A and B), and 3)
Franchi, Martino V, Fitze, Daniel P, Raiteri, Brent J, Hahn, Daniel, Spörri, Jörg   +4 more
openaire   +7 more sources

Knee Moment-Angle Characteristics and Semitendinosus Muscle Morphology in Children with Spastic Paresis Selected for Medial Hamstring Lengthening. [PDF]

PLoS ONE, 2016
To increase knee range of motion and improve gait in children with spastic paresis (SP), the semitendinosus muscle (ST) amongst other hamstring muscles is frequently lengthened by surgery, but with variable success.
Helga Haberfehlner, Richard T Jaspers, Erich Rutz, Jules G Becher, Jaap Harlaar, Johannes A van der Sluijs, Melinda M Witbreuk, Jacqueline Romkes, Marie Freslier, Reinald Brunner, Huub Maas, Annemieke I Buizer   +11 more
doaj   +1 more source

The architectural characteristics of the hamstring muscles do not differ between male and female elite-level rugby union players

Frontiers in Physiology, 2023
Purpose: To determine whether differences exist in the architectural characteristics of the hamstring muscles of elite-level male and female rugby union players.Methods: Forty elite-level rugby union players (male n = 20, female n = 20) participated in ...
Kevin Cronin, Shane Foley, Seán Cournane, Giuseppe De Vito, Fearghal Kerin, Fearghal Kerin, Garreth Farrell, Eamonn Delahunt, Eamonn Delahunt   +8 more
doaj   +1 more source

Muscle in Variable Gravity: “I Do Not Know Where I Am, But I Know What to Do”

Frontiers in Physiology, 2021
Purpose: Fascicle and sarcomere lengths are important predictors of muscle mechanical performance. However, their regulation during stretch-shortening cycle (SSC) activities in usual and challenging conditions is poorly understood.
Elena Monti, Janice Waldvogel, Ramona Ritzmann, Ramona Ritzmann, Kathrin Freyler, Kirsten Albracht, Kirsten Albracht, Michael Helm, Niccolò De Cesare, Piero Pavan, Carlo Reggiani, Albert Gollhofer, Marco Vincenzo Narici   +12 more
doaj   +1 more source

Relationship between joint torque and muscle fascicle shortening at various joint angles and intensities in the plantar flexors

Scientific Reports, 2017
Because it is difficult to measure tendon length changes directly in humans, tendon length changes during dynamic movement have been evaluated indirectly from changes in muscle fascicle length and joint angle. The purpose of this study was to examine the
Atsuki Fukutani, Jun Misaki, Tadao Isaka
doaj   +1 more source