Effect of eccentric training with different training loads in muscle morphology and power

Postgraduate Thesis uoadl:2837789 286 Read counter

Unit:
Κατεύθυνση Κοινωνικές και Ανθρωπιστικές Σπουδές
Library of the School of Physical Education and Sport Science
Deposit date:
2018-12-17
Year:
2018
Author:
Zacharia Evangelia
Supervisors info:
Γεράσιμος Τερζής, αναπληρωτής καθηγητής Κλασικού Αθλητισμού, Αθλητικές Ρίψεις, Σ.Ε.Φ.Α.Α., Ε.Κ.Π.Α
Γρηγόρης Μπογδάνης, επίκουρος καθηγητής Κλασικού Αθλητισμού, Αθλητικά Άλματα, Σ.Ε.Φ.Α.Α., Ε.Κ.Π.Α
Γεώργιος Καραμπάτσος, επίκουρος καθηγητής Κλασικού Αθλητισμού, Αθλητικές Ρίψεις, Σ.Ε.Φ.Α.Α., Ε.Κ.Π.Α
Original Title:
Eπίδραση της έκκεντρης προπόνησης με διαφορετικούς προπονητικούς όγκους στην μυϊκή μορφολογία και επίδοση
Languages:
English
Greek
Translated title:
Effect of eccentric training with different training loads in muscle morphology and power
Summary:
Eccentric-only squats performed with fast velocity may be a strong stimulus for muscle power development and muscle morphology adaptations. However, it remains unknown if there is a relationship between training volume of that kind of training and changes in muscle morphology and performance. Aim of the study is to investigate the effect of different training volumes of eccentric –only training with fast velocity in muscle morphology and power. Twenty-five physical education students with minimal experience in resistance exercise were assigned in three groups and performed 5 weeks of fast eccentric-only squats twice per week. First group performed 8 sets of 8 repetitions (8x8) eccentric-only squats with fast velocity, the second 6x8 and the third 4x8 eccentric-only squats in every training session. Before and after the training, 1RM squat, 5m sprint, counter movement jump, leg press RFD and vastus lateralis muscle morphology were evaluated. 1RM squat, sprint performance and counter movement jump significantly increased in all groups, without difference between groups. RFD significantly increased only in 8x8 group (21.5%, p<0.05). Fascicle length and muscle thickness of vastus lateralis and cross-sectional area of quadriceps significantly increased in all groups (p<0.05), without difference between the 3 groups. Muscle fibers’ pennation angle significantly decreased in 8x8 group (p<0.05). Muscle fiber composition was not altered in either group, while there was significant increase in all fibers type cross sectional area in all groups (p<0.05). The results showed that 64 repetitions of eccentric-only squats with fact velocity per session, in just 5 weeks, can induce significant increases in performance, in muscle mass and to maintain fiber type IIX presentence.
Main subject category:
Education - Sport science
Keywords:
Muscle power, Dose-response training, Eccentric Squating
Index:
Yes
Number of index pages:
6
Contains images:
Yes
Number of references:
204
Number of pages:
110
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