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NCT Number: NCT03884738

Strengthening Effect on Hamstring's Passive Mechanical Properties

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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Key information

Conditions

Sports Physical Therapy Behavior Motor Activity

Age range

18 year–30 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Hacettepe University

Ankara, 06100, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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)

Treatment and study plan

concentric exercise

Other

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.

Nordic Eccentric exercise

Other
  • st week - 1 day - 2 sets of 5 repeats.
  • nd week - 2 days - 2 sets of 6 repeats.
  • rd week - 3 days - 3 sets of 6-8 repeats.
  • 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.

Neuromuscular electrical stimulation

Other

8 weeks, three times per week, 15 minutes of bilateral hamstring stimulation. 100 Hz. frequency, 600 microsecond duration rectangular current

Primary outcomes

  1. Passive Mechanical Properties

    Time frame: Change from baseline passive mechanical properties at 8 weeks

    Tone, Elasticity and Stiffness evaluation. Evaluated with Myotonometer-3

Secondary outcomes

  1. Flexibility Measurement

    Time frame: Change from baseline flexibility at 8 weeks

    Sit and reach test was used for hamstring flexibility

  2. Muscle Strength Measurement

    Time frame: Change from baseline muscle strength at 8 weeks

    Hamstring and Quadriceps strength were measured with LaFayette Manuel Muscle Tester

  3. Agility Measurement

    Time frame: Change from baseline agility time at 8 weeks

    Illinois Agility Test was used for agility measurement

  4. Anaerobic Explosive Power

    Time frame: Change from baseline anaerobic explosive power at 8 weeks

    Jump and Reach test was administered

  5. Reaction Time

    Time frame: Change from baseline reaction time at 8 weeks

    ruler drop test was used for reaction timing

Sponsors and collaborators

Lead sponsor

Hacettepe University

Other

Registry information

Official study title

Effects Of Different Strengthening Methods On Hamstring Muscle Group's Passive Mechanical Properties in Healthy Individuals

Important dates

Study start
2019
Primary completion
2019
Study completion
2019
First posted
Mar 21, 2019
Registry last updated
Apr 22, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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