The effects of eccentric hamstring exercise training in young female handball players.

Autor: Váczi M; Institute of Sport Sciences and Physical Education, University of Pécs, Ifjúság útja 6, 7624, Pécs, Hungary., Fazekas G; National Institute for Medical Rehabilitation, Budapest, Hungary.; Department of Rehabilitation Medicine, University of Szeged, Szeged, Hungary., Pilissy T; Department of Manufacturing Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary., Cselkó A; Institute of Sport Sciences and Physical Education, University of Pécs, Ifjúság útja 6, 7624, Pécs, Hungary.; Doctoral School of Health Sciences, University of Pécs, Pécs, Hungary., Trzaskoma L; Department of Biomechanics, Kinesiology and Informatics, Faculty of Physical Education and Sport Science, Semmelweis University, Budapest, Hungary., Sebesi B; Institute of Sport Sciences and Physical Education, University of Pécs, Ifjúság útja 6, 7624, Pécs, Hungary. sebesi.balazs@pte.hu.; Doctoral School of Biology and Sportbiology, University of Pécs, Pécs, Hungary. sebesi.balazs@pte.hu., Tihanyi J; Department of Biomechanics, Kinesiology and Informatics, Faculty of Physical Education and Sport Science, Semmelweis University, Budapest, Hungary.
Jazyk: angličtina
Zdroj: European journal of applied physiology [Eur J Appl Physiol] 2022 Apr; Vol. 122 (4), pp. 955-964. Date of Electronic Publication: 2022 Jan 22.
DOI: 10.1007/s00421-022-04888-5
Abstrakt: Purpose: The multidimensional role of hamstring muscle group strength in athletic performance and injury prevention is well documented, and nordic hamstring exercise (NHE) is a popular method for the development of hamstring strength. Our aim was to examine the EMG characteristics of the eccentric NHE as well as the effects of long-term eccentric NHE training on muscle strength and vertical jump performance in 10- to 11-year-old female handball players.
Methods: Players from the same handball team were randomly assigned to an eccentric NHE training (13 players) or a control group (10 players). Both groups continued their regular handball training routine, but the NHE group performed additional eccentric NHE exercises once or twice a week, with progressively increasing volume, over 20 weeks. To test training effects, countermovement jump (CMJ) height, eccentric hamstring impulse, peak torque, and angle of peak torque were evaluated before, during and after the training period. In the pre-exercise test, EMG activity of the medial and lateral hamstring muscle was also assessed during NHE.
Results: Hamstring activities ranged between 98 and 129%. Lateral hamstring activity was greater than medial only in the right leg during NHE. Eccentric hamstring impulse improved in both legs at 10 weeks in both groups. Then, at 20 weeks, it remained unchanged in the NHE but decreased in controls. A similar adaptation was seen in eccentric hamstring torque, without change in the optimum knee angle. CMJ height improved only in the NHE.
Conclusion: It is concluded that NHE activates the hamstring musculature effectively, and a favourable mechanical adaptation to long-term NHE exercise in girls can be triggered as early as 11 years of age.
(© 2022. The Author(s).)
Databáze: MEDLINE
Externí odkaz: