Comparison Between Eccentric Hamstring Training and Sprint-Specific Training
Trial statusNot yet recruiting
Trial phaseNot applicable
Trial typeInterventional
Biological sexAll
Age18-25
SponsorUniversity of Wisconsin, Madison
About this trial
The purpose of this study is to compare the effects of an intensity-, volume-, and time under tension-matched eccentric hamstring exercise intervention with the Romanian deadlift (RDL) and the Nordic hamstring exercise (NHE) to a sprint-specific training program on hamstring muscle architecture, volume, sprint performance, strength, and power.
Participants will be assigned to complete one of the 3 hamstring interventions for 10 weeks.
Eligibility criteria
This trial accepts healthy volunteersQualifiers
Age 18-25 years
Actively participating in a club team
>6 months experience with resistance training
Minimum of 1 year experience at the high school level in organized team sport
Disqualifiers
Unable to refrain from resistance training outside the study
Unable to make at least 80% of the training sessions
Hamstring injury in the last 6 months
History of major lower extremity surgery (including back)
Trial design
Design model
Parallel
Treatments tested in this trial
RDL
Other interventionThe RDL will be performed with a 6 second eccentric component with the athlete returning to the start position with a maximal concentric hip extension.
NHE
Other interventionThe NHE will be performed with a 6 second eccentric component.
Sprint testing
Other interventionThe sprint training program will be performed twice per week with the first day of training focused on shorter distances to focus on acceleration and the second training day focused on maximal velocity. The relative efforts and distances for each training day will mimic a similar prescription to that of the resistance training program.
Treatment groups
90 Participants
are divided into 3 treatment groupsGroup A: Romanian dead lift (RDL) groupExperimental treatment 1 intervention
Group B: Nordic hamstring exercise (NHE) groupExperimental treatment 1 intervention
Group C: Sprint groupExperimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Change in fascicle length (FL)
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)2
Change in muscle cross-sectional area (CSA)
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)3
Change in muscle volume
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)4
Change in pennation angle (PA)
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)Secondary outcomes
1
Change in eccentric strength
Eccentric hamstring strength of each limb will be assessed during the hamstring exercise.
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)2
Change in inertial measurement units (IMU)-based sprinting biomechanics
Sprinting biomechanics will be assessed using seven IMUs (sacrum, both thighs, both shanks, both feet). Lower extremity joint motions referenced to upright stance will be calculated throughout an on-field sprint and other football drills.
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)3
Change in countermovement jump (CMJ) performance
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)4
Change in standing broad jump (SBJ) performance
Time frame
Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)Sponsors and contacts
Click on the lead sponsor to view all of their trials.
University of Wisconsin, Madison
Lead sponsor
National Strength and Conditioning Association (NSCA) Foundation
Collaborator
Source ClinicalTrials.gov
This trial is not recruiting at the moment. You can still explore other options: