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Eccentric Training Effects on Hamstrings Structure, Strength, and Sprint Performance

Healthy Clinical Trial

Official title:
Changes in Biceps Femoris Architecture, Hamstrings Eccentric Strength, and Sprint Performance Following Romanian Deadlift vs. Nordic Hamstring Exercise Intervention

Clinical Trial Summary

The overall goal of this study is to investigate the effects of a 6-week training program between two hamstring exercises-the Romanian deadlift (RDL) and the Nordic hamstring exercise (NHE)-on hamstring strain injury risk factors and sprint performance.

Clinical Trial Description

Prior to the intervention, participants will report to the lab on one occasion for baseline assessments. During the baseline visit, a) regional measures of biceps femoris long head fascicle length, pennation angle, muscle thickness, and anatomical cross-sectional area will be determined using ultrasound, b) baseline NHE strength and 3RM for the RDL will be determined, and c) maximal 60 m sprint performance will be measured. Participants will be randomly assigned to either the RDL or NHE. After randomization, each participant will undergo the 6 week intervention program based upon their group allocation. Exercises will be performed using a 6 second eccentric (i.e., lowering) contraction. Following the 6 week intervention, participants would return to the lab for post-intervention assessments of regional hamstring morphology and architecture and sprint testing, which would be carried out in the same manner as baseline assessments. Since fascicle length changes are known to return to baseline values within 2 weeks after the cessation of eccentric training, participants will be asked to return to the lab following a 2 week detraining period where final imaging, strength, and sprint performance assessments will be determined. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT05455346
Study type Interventional
Source University of Wisconsin, Madison
Contact
Status Completed
Phase N/A
Start date December 2, 2022
Completion date December 8, 2023
View Details
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