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Title:Effects of eccentric training at long muscle length on architectural and functional characteristics of the hamstrings
Authors:ID Marušič, Jan (Author)
ID Vatovec, Rok (Author)
ID Marković, Goran (Author)
ID Šarabon, Nejc (Author)
Files:URL https://onlinelibrary.wiley.com/doi/abs/10.1111/sms.13770
 
Language:English
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:IAM - Andrej Marušič Institute
Abstract:Hamstring strain injuries during sprinting or stretching frequently occur at long-muscle length. Yet, previous research has mainly focused on studying the effectiveness of eccentric hamstring strengthening at shorter muscle length on hamstring performance, morphology, and hamstring strain injury risk factors. Here, we evaluated the effects of 6-week eccentric hamstring training at long-muscle length on functional and architectural characteristics of the hamstrings. Healthy and injury-free participants (n = 40; age 23.7 % 2.5 years) were randomly assigned to control or intervention group. Training intervention consisted of 12 sessions with two eccentric hamstring exercises in a lengthened position. Outcome measures included isokinetic and isometric knee flexion peak torque, Nordic hamstring exercise peak torque, voluntary activation level, and countermovement jump performance. Ultrasonography was used to determine muscle thickness, pennation angle, and fascicle length of biceps femoris long head (BFlh). A significant time % group interaction effect was observed for all measured parameters except countermovement jump performance and muscle thickness. The training intervention resulted in increased concentric and eccentric knee flexion peak torque at 60°/s (d = 0.55-0.62, P = .02 and .03) and concentric peak torque at 180°/s (d = 0.99, P = .001), increased isometric knee flexion peak torque (d = 0.73, P = .008) and Nordic hamstring exercise peak torque (d = 1.19, P < .001), increased voluntary activation level (d = 1.29, P < .001), decreased pennation angle (d = 1.31, P < .001), and increased fascicle length (d = 1.12, P < .001) of BFlh. These results provide evidence that short-term eccentric hamstring strengthening at long-muscle length can have significant favorable effects on various architectural and functional characteristics of the hamstrings.
Keywords:biceps femoris, fascicle length, knee flexion torque, pennation angle, strength
Year of publishing:2020
Number of pages:str. 1-13
PID:20.500.12556/RUP-13943 This link opens in a new window
UDC:796.012
ISSN on article:0905-7188
DOI:10.1111/sms.13770 This link opens in a new window
COBISS.SI-ID:24333827 This link opens in a new window
Publication date in RUP:07.08.2020
Views:3762
Downloads:67
Metadata:XML DC-XML DC-RDF
:
MARUŠIČ, Jan, VATOVEC, Rok, MARKOVIĆ, Goran and ŠARABON, Nejc, 2020, Effects of eccentric training at long muscle length on architectural and functional characteristics of the hamstrings. Scandinavian journal of medicine & science in sports [online]. 2020. P. 1–13. [Accessed 6 April 2025]. DOI 10.1111/sms.13770. Retrieved from: https://onlinelibrary.wiley.com/doi/abs/10.1111/sms.13770
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Record is a part of a journal

Title:Scandinavian journal of medicine & science in sports
Publisher:Munksgaard
ISSN:0905-7188
COBISS.SI-ID:230378 This link opens in a new window

Secondary language

Language:English
Keywords:dvoglava stegenska mišica, dolžina fascikla, navor upogibalk kolena, peresni kot, jakost


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