RecruitingNot ApplicableNCT07660926

Optimizing Hamstring Activation Through EMG-Feedback and the Hamshell Device


Sponsor

Praxisklinik Rennbahn AG

Enrollment

50 participants

Start Date

Jun 9, 2026

Study Type

INTERVENTIONAL

Conditions

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.


Eligibility

Min Age: 18 YearsMax Age: 40 Years

Inclusion Criteria2

  • Age between 18 and 40 years
  • Recreationally active, defined as engaging in at least 150 minutes per week of moderate-intensity physical activity

Exclusion Criteria2

  • Current or recent (≤6 months) musculoskeletal injury of the lower extremities
  • Inability to follow study procedures or instructions

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Interventions

BEHAVIORALEMG-Biofeedback-Training

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.

BEHAVIORALControl

Particpants in the control group will perform the same training as the intervention group but without EMG feedback.


Locations(1)

Rennbahnklinik

Muttenz, Switzerland

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NCT07660926


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