An interventional study of Concentric Exercise and Nordic Eccentric exercise in Sports Physical Therapy, sponsored by Hacettepe University. Completed at 1 site in Turkey. Open to male participants aged 18 Years to 30 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2020-04-22.
Sponsored by Hacettepe University · Not applicable, Interventional, and Basic science
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.
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Exclusion Criteria:
Leg Curl Training
Other: Concentric Exercise
Nordic Hamstring Training
Other: Nordic Eccentric exercise
Stimulation Training
Other: Neuromuscular Electrical Stimulation
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.
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.
8 weeks, three times per week, 15 minutes of bilateral hamstring stimulation. 100 Hz. frequency, 600 microsecond duration rectangular current
Passive Mechanical Properties
Tone, Elasticity and Stiffness evaluation. Evaluated with Myotonometer-3
Time frame: Change from baseline passive mechanical properties at 8 weeks
Flexibility Measurement
Sit and reach test was used for hamstring flexibility
Time frame: Change from baseline flexibility at 8 weeks
Muscle Strength Measurement
Hamstring and Quadriceps strength were measured with LaFayette Manuel Muscle Tester
Time frame: Change from baseline muscle strength at 8 weeks
Agility Measurement
Illinois Agility Test was used for agility measurement
Time frame: Change from baseline agility time at 8 weeks
Anaerobic Explosive Power
Jump and Reach test was administered
Time frame: Change from baseline anaerobic explosive power at 8 weeks
Reaction Time
ruler drop test was used for reaction timing
Time frame: Change from baseline reaction time at 8 weeks
Plan to share: No
This study is completed, as verified in Apr 2020. You cannot join it, but the record below documents what was studied.
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Hacettepe University