Association Between Knee Isokinetic Testing and Lower Limb Functional Performance and Limb Symmetry

Study Overview
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Brief Summary
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This study aimed to evaluate the association between the isokinetic knee strength and/or proprioception performance with the functional performance on the functional Hop-tests and Y-balance test. This study included 20 healthy individuals who performed an isokinetic assessment of knee proprioception (joint position sense, JPS and threshold to detection of passive motion, TDPM) and flexors/extensors strength. At the same time, they performed a functional testing consisting of three Hop-tests (single, triple and cross-over) and the Lower Quarter Y-Balance Test (YBT-LQ). We tested the correlation between the isokinetic and functional performances, and limb symmetry indexes.

Official Title
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Association Between Knee Isokinetic Testing and Lower Limb Functional Performance and Limb Symmetry

Conditions
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Proprioceptive Disorders

Intervention / Treatment
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* Device: All group


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: individuals under 45 years of age who performed at least 4 hours of physical activity per week. Exclusion Criteria: individuals unable to perform isokinetic muscle tests individuals with a current or recent lower limb injury with time loss from sport participation within the previous month individuals with previous severe knee injury (eg. Severe ligament tear, knee fracture) individuals taking medications with potential balance/coordination side effects.

Study Plan
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How is the study designed?
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Arms and Interventions

| Intervention/Treatment |
| --- |
|Device: All group|All the participants performed the isokinetic proprioception and strength tests and the functional tests, on the same visit.|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Strength | Measurement of knee extensors and flexors peak strength (in newton.meter, Nm) on isokinetic dynamometer. | one evaluation at a single point in time through study completion, an average of 4 months | 
| Knee proprioception, JPS1 | Measurement of knee proprioception by the passive repositioning technique (JPS, in degrees) on isokinetic dynamometer. | one evaluation at a single point in time through study completion, an average of 4 months | 
| Knee proprioception, JPS2 | Measurement of knee proprioception by the active repositioning technique (JPS, in degrees) on isokinetic dynamometer. | one evaluation at a single point in time through study completion, an average of 4 months | 
| Knee proprioception, TDPM | Measurement of knee proprioception by the Threshold to Detection of Passive Motion (TDPM in degrees) on isokinetic dynamometer. | one evaluation at a single point in time through study completion, an average of 4 months | 
| Functional testing, Hop tests | Hop test. Single hop: Patients are instructed to stand on one leg and perform 1 jump as far as possible, landing on the same leg. The total distance is recorded (in cm) .Triple hop: Patients are instructed to stand on one leg and perform 3 hops as far as possible, landing on the same leg. The total distance for 3 consecutive hops is recorded (in cm). Cross-over hop test : The patient hops forward 3 times while alternately crossing over a marking The patient is instructed to position themselves such that the first of the 3 hops was lateral with respect to the direction of crossover The total distance hopped forward is recorded (in cm) | one evaluation at a single point in time through study completion, an average of 4 months |