Trial · NCT07913451
Registered outcomes31
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
1 to 20 of 31
Download this page as JSON| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Knee Extensor Explosive Strength | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Knee extensor explosive strength will be assessed using a rigid custom-built dynamometer mounted with a load cell sampling at 1000 Hz. Participants will be positioned in the seat with the centre of the knee joint aligned with the axis of rotation. The backplate will be adjusted to maintain a hip flexion angle of 80° relative to full extension, and the load cell connected to a shank plate will be adjusted to the same position for all participants, approximately 2.5 cm above the lateral malleolus. Testing will be conducted at 80° of knee flexion relative to full extension, verified using a goniometer. Velcro straps will be secured across the shoulders, waist, and thigh to minimize participant movement. The participant's shank will be strapped to an ankle attachment with a Velcro strap. The moment arm, defined as the distance from the knee joint centre to the contact point with the ankle attachment, will be measured using a measuring tape. The seat position and moment arm from the centre |
| Primary | Lower Limb Explosive Strength | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Leg Press Testing: Lower-limb strength will be assessed using robotic servomotor leg press maximal voluntary contraction testing. Participants will complete three MVCs of isometric, concentric, and eccentric leg press force testing using a robotic servomotor leg press. This will include three MVCs of isokinetic eccentric and concentric leg press actions performed at a constant speed of 0.2 m·s-¹. Each strength test will be separated by a 3-5-minute rest period, and each repetition will be separated by a 10-second rest interval. Strong verbal encouragement will be provided throughout the testing session by a certified exercise physiologist. MVC leg extensor strength will be measured using a robotic servomotor leg press device sampling at 200 Hz. Three repetitions of MVC eccentric and concentric leg press movements will be performed between 100° and 10° of knee flexion at a constant speed of 0.2 m·s-¹, with a 0.5-second pause between the concentric and eccentric movement phases. Servomo |
| Primary | Countermovement Jump Stretch-Shortening Cycle Mechanics | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Countermovement jump stretch-shortening cycle mechanics will be assessed using a dual force plate system sampling at 1000 Hz. Participants will be instructed to keep their hands firmly placed on their hips during unloaded countermovement jump testing to isolate the contributions of the lower limbs to vertical jump height and body centre of mass power and work production. During loaded countermovement jump testing, participants will hold the hexagonal trap bar and will be instructed to keep their arms straight throughout the entire jumping procedure. Participants will freely determine all other aspects of jump strategy, including their preferred depth, defined as downward body centre of mass displacement. The vertical ground reaction forces of the right and left leg will be measured synchronously and stored for later offline analysis. Body centre of mass vertical velocity will be obtained by time integration of the instantaneous acceleration signal from the sum of the left and right ve |
| Primary | Maximal Sprint Speed | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Maximal sprint speed (vMax) will be assessed using a 40 m linear sprint with electronic timing gates positioned perpendicular to a flat, non-slip sprinting surface at 10, 20, 30, and 40 m. Over-ground sprint testing across distances of 5-40 m is commonly used to assess sprint ability in youth athletes. Timing gates will be set at a standardized height of 1.0 m from the ground and positioned 1.22 m apart, corresponding to the approximate width of a standard track lane. Participants will begin from a stationary two-point standing start with the front foot positioned at the 0 m start line. Participants will start when ready and will be instructed to sprint maximally through the 40 m finish line without decelerating before the final timing gate. Each athlete will complete three maximal sprint trials, with 3-5 min of passive recovery between trials. Split times will be recorded at 10, 20, 30, and 40 m. vMax will be calculated from the fastest 10 m split recorded between timing gates, using |
| Primary | Maximal Aerobic Speed | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Maximal aerobic speed (vMAS) was estimated using a 5-minute maximal running time trial performed on an indoor track. Athletes were instructed to cover the greatest possible distance in 5 minutes using an even maximal pacing strategy. Total distance covered was recorded to the nearest meter. The 5-minute running field test was selected because it provides a practical group-administered estimate of vMAS and has demonstrated strong agreement with treadmill-derived vMAS, and the test has also demonstrated strong test-retest reliability in trained men and women. |
| Primary | 5-10-5 Change of Direction Test | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Change-of-direction speed will be assessed using the standardized 5-10-5 shuttle test. The course consisted of three parallel lines positioned in a straight line, with the centre line serving as the start/finish line and two turn lines positioned 5 yards (4.57 m) to the left and right of centre on a flat, dry, non-slip surface with sufficient space beyond each turn line. This produced a total running distance of 20 yards (18.28 m): 5 yards to the first turn line, 10 yards (9.14 m) to the opposite turn line, and 5 yards back through the finish. Electronic timing gates were positioned at the centre start/finish line, perpendicular to the running direction. Timing gates were set at a standardized height of 1.0 m and positioned consistently for all athletes and across all testing sessions. |
| Primary | Feasibility - recruitment | From enrolment to the end of the stud (approx 24 weeks) | Number of participants recruited |
| Primary | Feasibility - retention rate | From enrolment to the end of the stud (approx 24 weeks) | Number of participants completing the trial divided by the total number of participants recruited |
| Primary | Feasibility - adverse events | From enrolment to the end of the stud (approx 24 weeks) | Number of adverse events |
| Primary | Feasibility - barriers and facilitators | From enrolment to the end of the stud (approx 24 weeks) | Barriers and facilitators to the protocol as described by the participants and physiotherapists |
| Secondary | Cervical Spine range of motion | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Cervical spine range of motion full/reduced in each motion tested for flexion, extension, rotation right and left, side flexion right and left |
| Secondary | Cervical Flexor Endurance (CFE) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Cervical spine range of motion full/reduced in each motion tested for flexion, extension, rotation right and left, side flexion right and left; measured in seconds where longer is better |
| Secondary | Cervical Flexion Rotation Test (CFRT) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Limitation of cervical spine range of rotation by greater than 20 decrease in a fully flexed position - has been demonstrated to have excellent diagnostic accuracy for cervicogenic headache. positive/negative |
| Secondary | Manual Spinal Exam (MSE) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Evaluation of segmental pain rated as positive if \>3/10 pain is reproduced and limited motion |
| Secondary | Cervical anterolateral flexion strength | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Cervical spine strength in full rotation and side flexion, measured with a handheld dynamometer (kg) |
| Secondary | Joint Position Sense | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Observational test measuring the ability to relocate the head to a neutral position following rotation, measured with a head lamp in degrees from centre. A lower score is a better score. |
| Secondary | Head Perturbation Test (HPT) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Ability of the participant to maintain a still head position when an unanticipated external force is applied, score /8 and a higher score is a better score |
| Secondary | Head thrust test (HTT) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Ability to maintain eyes focused on a target with a quick head motion, measured to the right and left. positive/negative. |
| Secondary | Clinical test of dynamic visual acuity (DVA) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Behavioural representation of the vestibule-ocular reflex reflecting the ability to maintain eyes on a target with head motion, measured in LogMAR where a lower score is a better score |
| Secondary | functional video head impulse test (f-vHIT) | Day 1, 6 weeks, 12 weeks, end of season (approximately 24 weeks) | Functional version of the vHIT; measures gain of the vestibulo-ocular reflex; score is percent of correct answers where higher is better |
Source ClinicalTrials.govtrials-2026-11-12-0.4.0
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNone stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
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