Sports Physical Therapy
Conditions
Keywords
Muscle Tonus, Elasticity, Electric Stimulation Therapy, Physical Conditioning, Human
Brief summary
The purpose of this study was to investigate effects of different strengthening methods on hamstring muscle group's passive mechanical properties and to investigate this effect's relation with performance changes in healthy individuals. 42 healthy sedentary male participated in this study. Passive mechanical properties and strength of hamstring and quadriceps muscles, flexibility of hamstring muscles, anaerobic explosive strength, reaction time, agility were measured. Participants randomized evenly into one of three groups; eccentric, concentric and neuromuscular electrical stimulation (NMES). After 8 weeks training period, participants were measured again.
Interventions
OTHERConcentric Exercise
Leg Curl Machine: 1st week - 1st day is 10 maximum repeat test. 2nd week - 2 days of training - 2 sets of 6 repeats. %60 percent of maximum load. 3rd week - 3 days of training - 3 sets of 6-8 repeats. %60-80 of maximum load. 4th-8th week - 3 days of training - 3 sets of 8-12 repeats. when 3 sets of 12 achieved, load was increased with 2.5kg.
OTHERNordic Eccentric exercise
1. st week - 1 day - 2 sets of 5 repeats. 2. nd week - 2 days - 2 sets of 6 repeats. 3. rd week - 3 days - 3 sets of 6-8 repeats. 4. th week - 3 days - 3 sets of 8-10 repeats. 5-8th weeks - 3 days - 3 sets of 12-8 repeats. When achieved 3 sets of 12 repeats with full range, speed was increased.
OTHERNeuromuscular Electrical Stimulation
8 weeks, three times per week, 15 minutes of bilateral hamstring stimulation. 100 Hz. frequency, 600 microsecond duration rectangular current
Sponsors
Hacettepe University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE
Intervention model description
randomization into three groups and measurement before and after intervention
Eligibility
Sex/Gender
MALE
Age
18 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* being sedentary
Exclusion criteria
* Having knee, hip and/or back pain * Having a cardiovascular condition/disease * History of previous knee and/or hip surgery * Having a diagnose of any systemic disease * History of previous hamstring injury * Being physically active within last year ( Regular activity at least 3 days a week and continuity of at least 2 months was accepted as being physically active)
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Passive Mechanical Properties | Change from baseline passive mechanical properties at 8 weeks | Tone, Elasticity and Stiffness evaluation. Evaluated with Myotonometer-3 |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Flexibility Measurement | Change from baseline flexibility at 8 weeks | Sit and reach test was used for hamstring flexibility |
| Muscle Strength Measurement | Change from baseline muscle strength at 8 weeks | Hamstring and Quadriceps strength were measured with LaFayette Manuel Muscle Tester |
| Agility Measurement | Change from baseline agility time at 8 weeks | Illinois Agility Test was used for agility measurement |
| Anaerobic Explosive Power | Change from baseline anaerobic explosive power at 8 weeks | Jump and Reach test was administered |
| Reaction Time | Change from baseline reaction time at 8 weeks | ruler drop test was used for reaction timing |
Countries
Turkey (Türkiye)
Outcome results
None listed