Comparison of the Effects of Selected Training Methods and SIS Stimulation on Balance, Motor Tests, and Strength
1 other identifier
observational
30
1 country
1
Brief Summary
The purpose of this study is to evaluate the effects of four-week training interventions-Nordic Hamstring Exercise, plyometric training, and neuromuscular training-combined with Super Inductive Stimulation (SIS) on hamstring muscle strength, balance, and motor performance.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at below P25 for all trials
Started Mar 2025
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
Study Start
First participant enrolled
March 15, 2025
CompletedFirst Submitted
Initial submission to the registry
September 11, 2025
CompletedFirst Posted
Study publicly available on registry
March 25, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
May 1, 2026
CompletedStudy Completion
Last participant's last visit for all outcomes
May 1, 2026
CompletedMarch 25, 2026
March 1, 2026
1.1 years
September 11, 2025
March 19, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (4)
Medial-Lateral Stability Index (MLSI)
Assessment of medial-lateral postural stability using a balance platform
Baseline and immediately post-intervention (Week 4)
Overall Stability Index (OSI)
Assessment of overall postural stability using a balance platform
Baseline and immediately post-intervention (Week 4)
Anteroposterior Stability Index (APSI)
Assessment of anteroposterior postural stability using a balance platform
Baseline and immediately post-intervention (Week 4)
Maximal hamstring muscle strength
Maximal voluntary strength of the hamstring muscles will be assessed bilaterally using a standardized strength testing protocol
Baseline and immediately post-intervention (Week 4)
Study Arms (4)
Nordic Hamstring Exercises + SIS stimulation
The participants will be randomly assigned to four research groups. The first research group will undergo a four-week Nordic Hamstring Exercise training program combined with Super Inductive Stimulation applied to the hamstring muscle group. The second research group will perform a four-week Nordic Hamstring Exercise training program. The third research group will undergo a four-week series of Super Inductive Stimulation sessions applied to the hamstring muscle group. The fourth group, which will serve as the control group, will not change their physical activity habits.
Plyometric traning + SIS stimulation
The participants will be randomly assigned to four research groups. The first research group will undergo a four-week plyometric training program combined with Super Inductive Stimulation applied to the hamstring muscle group. The second research group will perform a four-week plyometric training program. The third research group will undergo a four-week series of Super Inductive Stimulation sessions applied to the hamstring muscle group. The fourth group, which will serve as the control group, will not change their physical activity habits.
Neuromuscular traning + SIS stimulation
The participants will be randomly assigned to four research groups. The first research group will undergo a four-week neuromuscular training program combined with Super Inductive Stimulation applied to the hamstring muscle group. The second research group will perform a four-week neuromuscular training program. The third research group will undergo a four-week series of Super Inductive Stimulation sessions applied to the hamstring muscle group. The fourth group, which will serve as the control group, will not change their physical activity habits.
Super Inductive Stimulation (SIS) Intervention
Super Inductive Stimulation (SIS) uses a high-intensity electromagnetic field (28 kT/s). The stimulus, induced by a coil placed in the applicator, generates depolarization of neuromuscular tissue. As a result, SIS evokes an action potential in the neuromuscular tissue, leading to the strengthening of weakened muscles. Due to the methodology of this intervention, the procedures are performed once per week over a period of 4 weeks.
Interventions
uses a high-intensity electromagnetic field (28 kT/s). The stimulus, induced by a coil placed in the applicator, generates depolarization of neuromuscular tissue
Nordic Hamstring Exercise training lasts 4 weeks, during which the participant performs 3 sets, each consisting of 3 repetitions of the NHE. After each set, a 2-minute passive rest period follows, during which the participant recovers. In the first week, the participant trains under the supervision of the instructor, while in the following three weeks the exercises are performed at home after prior instruction.
The intervention lasts 4 weeks, during which participants train three times per week. The program consists of single-leg and double-leg jumps, vertical jumps, lateral jumps, and forward jumps, all performed on a stable surface. A principle of progressive overload is applied, with gradual increases in training intensity, volume, and jump height. The progression begins with lower intensity exercises, single-joint movements, and less complex techniques, and advances to higher intensity exercises, multi-joint movements, and more complex techniques.
The intervention lasts 4 weeks, with participants training three times per week. The program focuses on improving dynamic stability and incorporates the use of BOSU equipment. Exercises include multitask movements performed on unstable surfaces as well as exercises with eyes closed. During the first week, exercises are performed on a stable surface to improve balance while standing on one leg with eyes open and closed. In the following weeks, exercises on unstable surfaces are introduced, emphasizing the maintenance of proper posture on either one or both legs during multitask activities. In the third week, dynamic exercises on unstable surfaces are added, such as single-leg squats. In the final week, jumps and hops are incorporated. To further increase difficulty, additional load is introduced in the form of medicine balls weighing between 2 and 8 kilograms.
Eligibility Criteria
Physically active individuals aged 19-40 years, performing a minimum of two training sessions per week.
You may qualify if:
- Healthy individuals aged 19-40,
- Without injuries,
- Physically active persons, athletes.
You may not qualify if:
- periods of peak training load specific to the athlete's discipline,
- evidence of overload-related pathology in the knee, hip, or lumbosacral joints,
- the presence of any pain symptoms,
- clinically relevant muscle fatigue or indicators of overtraining,
- engagement in strength-based sports within several weeks preceding competition,
- active inflammatory conditions involving osseous, articular, or ligamentous structures of the lower limbs,
- a history of injury or surgical intervention within the 6 months prior to the study intervention.
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Gdansk University of Physical Education and Sport
Gdansk, 80-336, Poland
MeSH Terms
Interventions
Intervention Hierarchy (Ancestors)
Study Officials
- STUDY CHAIR
Ewelina Perzanowska, PhD
Department of Kinesytherapy
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- OTHER
- Time Perspective
- OTHER
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Principal Investigator
Study Record Dates
First Submitted
September 11, 2025
First Posted
March 25, 2026
Study Start
March 15, 2025
Primary Completion
May 1, 2026
Study Completion
May 1, 2026
Last Updated
March 25, 2026
Record last verified: 2026-03
Data Sharing
- IPD Sharing
- Will not share