What is the Influence of Visual-motor Reliance on Planned and Unplanned Change of Direction Biomechanics 7 Months Post Anterior Cruciate Ligament Reconstruction?
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 90
- 试验地点
- 1
- 主要终点
- change of direction biomechanics- planned versus unplanned
研究概览
简要总结
The majority of anterior cruciate ligament (ACL) injuries occur during non-contact mechanisms.This suggests that an individual's movement technique is a significant factor in the cause of the injury. Hence, ACL injuries are increasingly being framed as an error in motor planning and execution.
Rehab following an ACL reconstruction (ACLR) commonly follows a pathway of: regaining ROM, strength development, power development, running, return to training and then return to competition. However, several studies utilising functional brain MRI and electroencephalogram have demonstrated dysfunction within the somatosensory and visual systems in the ACLR population even after the completion of rehabilitation. This has been suggested to indicate that the ACLR population becomes reliant on their visual system during motor planning and execution, potentially increasing the risk of reinjury.
详细描述
It has been demonstrated in studies utilising functional brain MRI and EEG that following ACLR, individuals have increased activation of the visual system during simple motor tasks as compared to healthy controls. This is suggested to represent an increased reliance on the visual system during motor planning and execution. Increased reliance on the visual system may negatively affect an individual's ability to respond to sporting situations which are often chaotic in nature, resulting in an inappropriate movement technique being employed. This may then result in an increased risk of reinjury. However, no study to date has been able to assess how visual reliance affects change of direction biomechanics.
The study will recruit individuals who are 7 months post-ACLR and intend on returning to multi-directional field sport. Individuals will complete a stepping down task (eyes open versus eyes closed) to identify participants who are reliant on their visual system. Participants will then complete a 90 deg change of direction task in a planned and then unplanned condition. Those who are visually reliant will be compared to those who are aren't with regards to their unplanned change of direction biomechanics and also the change in their biomechanics from a planned to unplanned condition.
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 18 Years 至 35 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Aged 18-35 years old
- •Playing club level Gaelic football or hurling
- •They must report that they intend on returning to sport at the same or higher level
- •Able to give written informed consent and to participate fully in the interventions
- •At 7 months biomechanical testing, individuals would need to have 70% symmetry of both quadriceps and hamstring peak torque as measured on our isokinetic dynamometer with the angular velocity set to 60°/s
- •Individuals should have already commenced linear running and double leg jumping tasks as part of their rehabilitation
- •They are currently attending a gym or can attain gym access for the duration of intervention period
排除标准
- •They have not commenced running or jumping in their rehabilitation
- •Revision ACL
- •They underwent concurrent meniscal repair, chondral repair or extra-articular augmentation
- •Serious medical conditions preventing them from completing high intensity resistance exercise
- •Any previous: injuries to the visual system, concussion, head injury, unexplained seizures or epilepsy
- •Any previous ankle or knee injuries
- •Those who are uncomfortable or do not want to hop with their eyes closed (one of the assessment tasks will involve hopping on one leg with their eyes open and followed by another set in which their eyes are closed
结局指标
主要结局
change of direction biomechanics- planned versus unplanned
时间窗: at 7 months post-ACLR
Participants will perform 90 degree cut within a 3D lab utilising using an eight-camera motion analysis system (200Hz: Bonita-B10, Vicon, UK) and integrated force plates (1000Hz BP400600, AMTI, USA). Timing gates (Smartspeed, Fusion Sport) will be used to time the change of direction and also provide the participant a visual stimulus as to which direction they need to cut to. The lights will be on during planned change of direction and 3 trials will be taken for each direction. During the unplanned change of direction, the target timing gates (right or left) will only switch on 2 metres prior to the participants approaching the force plates. 3 trials will be taken in the unplanned condition
Time to stability during stepdown task (eyes open versus eyes closed)
时间窗: at 7 months post-ACLR
Participants will stepdown from a 20cm box and land on one leg. Participants will be advised to achieve stability as quickly as possible and then to remain in that position for 20 seconds. Participants will complete 3 trials on each leg first with their eyes open and then a further 3 trials on each leg whilst blindfolded. Participants will perform this test in the 3D lab utilising using an eight-camera motion analysis system (200Hz: Bonita-B10, Vicon, UK)
次要结局
- Joint position sense test(at 7 months post-ACLR)
- single leg balance (eyes open versus eyes closed)(at 7 months post-ACLR)
- Quadriceps and hamstrings strength(at 7 months post-ACLR)
- Countermovement jump- double and single leg(at 7 months post-ACLR)
- Drop jump- double leg and single leg(at 7 months post-ACLR)
- anterior cruciate ligament return to sport after injury (ACL-RSI) questionnaire(at 7 months post-ACLR)
- Tampa scale of kinesiophobia(at 7 months post-ACLR)
- Near far quickness score (as part of visual processing software)(at 7 months post-ACLR)
- International knee documentation committee (IKDC) Questionnaire(at 7 months post-ACLR)
- Perception span (as part of visual processing software)(at 7 months post-ACLR)
- Reaction time (as part of visual processing software)(at 7 months post-ACLR)
- Near far quickness reaction time to target (as part of visual processing software)(at 7 months post-ACLR)
- multiple object tracking score (as part of visual processing software)(at 7 months post-ACLR)