Optimizing Hamstring Activation Through EMG-Feedback and the Hamshell Device
EMG-BF
2 other identifiers
interventional
50
1 country
1
Brief Summary
In this study, we investigate whether training of the posterior thigh muscles with visual feedback on muscle activity is more effective than the same training without feedback. To this end, healthy, physically active adults complete a training programme on a training device twice a week for five weeks. Muscle strength, muscle activity, and flexibility are measured before and after the training. Participants are randomly assigned to one of two groups: one group trains with feedback on muscle activity, the other without. Participation involves minimal risks, similar to those of a typical strength training session (e.g. muscle soreness). The aim of the study is to improve training methods for the prevention of muscle injuries.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for not_applicable
Started Jun 2026
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
June 9, 2026
CompletedStudy Start
First participant enrolled
June 9, 2026
CompletedFirst Posted
Study publicly available on registry
June 22, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
June 30, 2027
ExpectedStudy Completion
Last participant's last visit for all outcomes
July 31, 2027
June 22, 2026
June 1, 2026
1.1 years
June 9, 2026
June 16, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
iEMG biceps femoris during a modified Nordic Hamstring Exercise
Integrated EMG activity of the biceps femoris (BF) muscle during the modified version of the Nordic Hamstring Exercise.
Before and after the 5-week intervention period
Secondary Outcomes (4)
Hamstring and quadriceps strength
Before and after the 5-week intervention period
Hamstring flexibility
Before and after the 5-week intervention period
EMG biceps femoris
Before and after the 5-week intervention period
Functional performance
Before and after the 5-week intervention period
Study Arms (2)
EMG-Biofeedback
EXPERIMENTALParticipants in this arm complete 10 training sessions with EMG feedback over a 5-week period. The training is designed to optimize biceps femoris and gluteus maximus activation at extended knee angles using the Hamshell device. All training sessions last approximately 30 minutes and are conducted at the Rennbahnklinik. The first and middle training sessions are supervised to ensure correct exercise execution and appropriate progression. During these supervised session, EMG will be recorded.
Control
ACTIVE COMPARATORParticpants in the control group will perform the same training as the intervention group but without EMG feedback.
Interventions
Participants complete 10 training sessions with EMG feedback over a 5-week period. The training is designed to optimize biceps femoris and gluteus maximus activation at extended knee angles using the Hamshell device. All training sessions last approximately 30 minutes and are conducted at the Rennbahnklinik. The first and middle training sessions are supervised to ensure correct exercise execution and appropriate progression. During these supervised session, EMG will be recorded.
Particpants in the control group will perform the same training as the intervention group but without EMG feedback.
Eligibility Criteria
You may qualify if:
- Age between 18 and 40 years
- Recreationally active, defined as engaging in at least 150 minutes per week of moderate-intensity physical activity
You may not qualify if:
- Current or recent (≤6 months) musculoskeletal injury of the lower extremities
- Inability to follow study procedures or instructions
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Rennbahnklinik
Muttenz, 4132, Switzerland
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- RANDOMIZED
- Masking
- NONE
- Purpose
- BASIC SCIENCE
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- SPONSOR
Study Record Dates
First Submitted
June 9, 2026
First Posted
June 22, 2026
Study Start
June 9, 2026
Primary Completion (Estimated)
June 30, 2027
Study Completion (Estimated)
July 31, 2027
Last Updated
June 22, 2026
Record last verified: 2026-06