Comparison Between Eccentric Hamstring Training and Sprint-Specific Training
Comparison Between Eccentric Hamstring Strength Training and Sprint-Specific Training on Muscle Hypertrophy, Strength, Power, and Sprint Performance in Club Sport Collegiate Athletes
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.
Studieöversikt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljerad beskrivning
Prior to the intervention, participants will undergo baseline testing which will include a) ultrasound imaging of the hamstrings muscles for measures of biceps femoris long head fascicle length, pennation angle, muscle thickness, anatomical cross-sectional area, and muscle volume b) passive and active ranges of motion, c) 3 repetition maximum (3RM) RDL strength, d) peak NHE force, e) countermovement jump height, f) broad jump distance, g) Pro Agility change of direction, and h) a 60 m sprint with sprint kinematics assessed via inertial measurement units.
Participants will be randomly assigned to either the RDL, NHE, or sprint training group. After randomization, each participant will undergo the intervention program based upon their group allocation.
Performance testing and imaging will be repeated mid-intervention, following the intervention, and after 2 weeks of deloading.
Studietyp
Studietyp
Inskrivning (Beräknad)
Inskrivning
Fas
Fas
- Inte tillämpbar
Kontakter och platser
Studiekontakt
Studiekontakt
- Namn: Scott K Crawford, PhD
- Telefonnummer: 608) 265-1308
- E-post: skcrawford2@wisc.edu
Studieorter
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Wisconsin
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Madison, Wisconsin, Förenta staterna, 53705
- University of Wisconsin - Madison
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Kontakt:
- Scott K Crawford, PhD
- Telefonnummer: 608-265-1308
- E-post: skcrawford2@wisc.edu
-
-
Deltagandekriterier
Urvalskriterier
Urvalskriterier
Åldrar som är berättigade till studier
- Vuxen
Tar emot friska volontärer
Beskrivning
Inclusion Criteria:
- 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
- No history of hamstring injury within the last 6 months
- No history of major lower extremity surgery (including back)
- No acute musculoskeletal injury to the lower extremity
- Not currently pregnant
Exclusion Criteria:
- 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)
- Acute musculoskeletal injury to the lower extremity
- Currently pregnant
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Övrig
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Dubbel
Antal vapen
Vapen och interventioner
Deltagargrupp / ArmDeltagargrupp / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
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Experimentell: Romanian dead lift (RDL) group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise.
The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training.
The RDL arm will perform RDL.
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The RDL will be performed with a 6 second eccentric component with the athlete returning to the start position with a maximal concentric hip extension.
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Experimentell: Nordic hamstring exercise (NHE) group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise.
The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training.
The NHE arm will performed NHE
|
The NHE will be performed with a 6 second eccentric component.
|
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Experimentell: Sprint group
The training intervention groups will undergo the same program with the only difference being the interventional hamstring exercise.
The program will consist of a 2-week familiarization period followed by 8 weeks of progressive training.
The 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.
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The 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.
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Vad mäter studien?
Primära resultatmått
Primära resultatmått
Resultatmått |
Tidsram |
|---|---|
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Change in fascicle length (FL)
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in muscle cross-sectional area (CSA)
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
|
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Change in muscle volume
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
|
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Change in pennation angle (PA)
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Sekundära resultatmått
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Change in eccentric strength
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Eccentric hamstring strength of each limb will be assessed during the hamstring exercise.
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in inertial measurement units (IMU)-based sprinting biomechanics
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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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.
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in countermovement jump (CMJ) performance
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in standing broad jump (SBJ) performance
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in change of direction (CoD) performance
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in range of motion (ROM) performance
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in hip flexion
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Change in anterior pelvic tilt
Tidsram: Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Baseline to Mid-intervention (6 weeks), Post-intervention (10 weeks), and Post 2 week de-training (12 weeks)
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Samarbetspartners och utredare
Sponsor
Sponsor
Samarbetspartners
Samarbetspartners
Studieavstämningsdatum
Studera stora datum
Studiestart (Beräknad)
Studiestart
Primärt slutförande (Beräknad)
Primärt slutförande
Avslutad studie (Beräknad)
Avslutad studie
Studieregistreringsdatum
Först inskickad
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Första postat
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste uppdatering publicerad
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Senast verifierad
Mer information
Termer relaterade till denna studie
Ytterligare relevanta MeSH-villkor
Andra studie-ID-nummer
Andra studie-ID-nummer
- 2026-0704
- UWMSN | SOE | Kinesiology Oper (Annan identifierare: UW Madison)
- Protocol Version 5/5/26 (Annan identifierare: UW Madison)
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