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Completed

NCT Number: NCT03641781

Comparison Of Isometric And Isokinetic Strength Training Effects On Physical Performance In Athletes With Knee Pain

Frequent sports events causing more injuries in athletes causing decline in their performance. Injuries around knee joint are common. Strength training of hamstring and quadriceps are effective tool in rehabilitation. The multi-speeds and multi-angles strength training plans were used to see the effects on symptoms and performance in athletes.

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Key information

Conditions

Knee Injuries Leg Injuries Wounds and Injuries

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

About this study

A total of 69 athletes with knee pain were recruited and randomly divided into two groups. 50 athletes completed the training programs, 25 in each group. Data was also collected from healthy athletes for normative values. International Knee Documentation Committee subjective knee evaluation form was used to report the athlete's knee condition and severity of symptoms including pain. Biodex isokinetic system was used for isokinetic and isometric strength trainings and kinetic data collection. Physical performance of an athlete was assessed by components of fitness through two commonly used tests: Illinois agility run test and vertical jump test. The athletic single leg stability test was used to assess the stability of athletes on Biodex Balance System.

Who can participate

Healthy volunteers accepted: No

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

Inclusion criteria

  • The adult athletes between ages 18 to 35 years.
  • Athletes with unilateral knee pain.
  • Both male and female.

Exclusion criteria

  • Athletes with bilateral knee pain and any deformity around knee were excluded from this study.
  • Any other joint involvement of lower limb while assessment were also excluded from study.
  • Athletes with recent history of surgeries for fractures or ligamentous reconstruction were excluded from this study.
  • Patients who were medically unstable.

Treatment and study plan

isometric strength training and isokinetic strength training

Other

Isokinetic strength program included strength training at 5 different velocities from slow to fast. Participants were trained on speed of 30°/sec, 90°/sec, 150°/sec, 210°/sec and 270°/sec. Flexion and extension movements were completed with 5 repetitions at each speed.

Participants of isometric strength training group performed isometric contractions at 30°, 45° and 60° of knee flexion with five repetitions at each angle for both hamstring and quadriceps.

Primary outcomes

  1. change in Agility Run Test time

    Time frame: change from baseline through completion an average of 3 weeks

    The agility run test was conducted by placing cones at the non-slippery surface. The time to complete the test was recorded by using stop watch. A 10 Meter distance in figure of 8 was made on ground with help of cones. Time taken to complete was recorded in seconds.

  2. change in Vertical Jump test height

    Time frame: change from baseline through completion an average of 3 weeks

    Vertical jump test was conducted by using the measuring tape placed on wall. Athletes were standing along the wall and the standing height, the highest level of finger touching the wall was recorded initially. Athlete then jumped vertically and marked on the wall and performed three repetitions. The greatest difference between initial standing height and after jump height was recorded as score of vertical jump.

  3. change in Athletic single leg stability test

    Time frame: change from baseline through completion an average of 3 weeks

    The athletic single leg stability test was used to assess the stability of athlete conducted by using Biodex Balance System SD (Biodex Medical Systems, Inc. NY, USA). Athletes were standing on involved leg and platform setting was at level 4. Athletes performed 3 repetitions of 20 seconds each with 10 seconds rest between the repetitions to complete the test. Overall stability index, anterior posterior index, and medial lateral index were recorded.

Secondary outcomes

  1. change in Peak Torque value (FT-LB)

    Time frame: change from baseline through completion an average of 3 weeks

    Highest muscular force output at any moment during a repetition. Peak torque indicates the muscle's maximum strength capability. This is also equivalent to a 1-repetition maximum (RM) isotonic strength test.

Sponsors and collaborators

Lead sponsor

Isra University

Other

Registry information

Important dates

Study start
2016
Primary completion
2016
Study completion
2016
First posted
Aug 22, 2018
Registry last updated
Aug 22, 2018

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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