Clinical trial NCT06445491: Effect of Sequencing on Outcome Measures
Official title: Influence of Test Order of Isokinetic Torque, Y-Balance/Firefighter-Specific Functional-Balance, and Forward-Step-Down on Test Performance: Identifying Optimal Sequences
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Muscle Weakness
Keywords: strength
dynamic balance
movement quality
injury prevention
Lead sponsor: Louisiana State University Health Sciences Center Shreveport
Sponsor class: OTHER
First posted: 2024-06-06
Enrollment: 12
Sex: ALL
Minimum age (years): 18
Maximum age (years): 57
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Intervention model description: All participants will receive all 6 iterations of testing order, but the order of test sequences will be randomized.
Primary purpose: OTHER

Brief summary: This pilot study will examine the effect of testing order on test outcomes for measures of strength, dynamic balance, and movement quality. Each participant will perform a baseline test, then will perform the 6 iterations of the testing sequence.

Detailed description: This study employs a Repeated Measures Design, with each participant tested multiple times in combinations of 1) the Isokinetic Torque Test, 2) the Y-Balance Test/Firefighter-Specific Functional-Balance Test, and 3) the Forward-Step-Down Test. The investigators will conduct a total of seven testing sessions, including a control session (informed consent, familiarization with outcome measures, and control data collection) and the following six different patterns: 1-2-3, 1-3-2, 2-1-3, 2-3-1, 3-1-2, and 3-2-1. The order of the sessions will be randomized and counterbalanced to prevent bias effects. The control session will be performed in the following order: (1) Forward-Step-Down Test, (2a) Firefighter Specific Functional Balance Test, (2b) Y-balance test, (3) isokinetic tests (hip then knee).

Participants will be asked to avoid exercise or vigorous physical activity for the 24 hours prior to any testing session to minimize the effects of non-test-related fatigue on the study outcomes. Pre and post-test fatigue will be measured with the Rating of Fatigue (ROF) Scale. Pre-and post-test exertion will be measured with the Borg Rating of Perceived Exertion (RPE) Scale (attached). Heartrate will be measured and recorded at each scale rating point.

Upon arrival for the control session, participants will have their height measured using a stadiometer and their weight recorded. This will be followed by the performance of the initial 1-2-3 pattern. The time needed for the participant to perform each test will be recorded and subsequent performances of that test will be carried out in this time frame.

For visits two through seven, participants will be weighed again upon arrival and perform one of the six patterns. Sessions two to seven will be separated by at least one day to minimize the influence of fatigue. Each session will include isokinetic torque measurements of the hip abductors and adductors, knee flexors and extensors, the Y-Balance Test, the Firefighter-Specific Functional-Balance Test, and the Forward-Step-Down Test. The dominant leg will be used for unilateral tests, as determined by the leg used to kick a ball. The order of outcome measures will be randomized for each participant to minimize the effects of fatigue and recovery.

Five minutes of warm-up on a stationary bike or walking will be performed to start each exercise session. Five minutes of rest and instruction will be provided between each outcome measure. Five minutes of rest will be given between isokinetic tests (hip abduction to adduction) to allow for machine set-up and instructions. One minute of rest will be given between each isokinetic speed, with three speeds tested for the hip (30°, 60°, and 120° per second) and knee (60°, 180°, and 300° per second) muscles.

Eligibility criteria: Inclusion Criteria:

* healthy adult by Physical Activity Readiness Questionnaire+ screening process

Exclusion Criteria:

* lower extremity or spine injury in past 6 months
* vestibular disorder
* known pregnancy
* inability to complete data collection

Primary outcomes:
measure: Forward-Step-Down Test
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Firefighter Specific Functional Balance Test
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Y-Balance Test
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Knee Extensor Isokinetic Test
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Hip Abductor Isokinetic Test
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
Secondary outcomes:
measure: Rating of Fatigue
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Rating of Perceived Exertion
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
measure: Heartrate
timeFrame: This outcome will be assessed at each visit throughout the study, an average of 6 weeks.
Other outcomes:
Locations:
city: Shreveport
country: United States
facility: LSUHSC-Shreveport
state: Louisiana
Study officials:
affiliation: LSUHSC-Shreveport
name: Erin McCallister, DPT
role: PRINCIPAL_INVESTIGATOR
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