Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON, Canada.
Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, ON, Canada.
Gait Posture. 2022 Feb;92:24-29. doi: 10.1016/j.gaitpost.2021.11.003. Epub 2021 Nov 7.
Individuals who have sustained a concussion often display associated balance control deficits and visuomotor impairments despite being cleared by a physician to return to sport. Such visuomotor impairments can be highlighted in collision avoidance tasks that involves a mutual adaptation between two walkers. However, studies have yet to challenged athletes with a previous concussion during an everyday collision avoidance task, following return to sport.
Do athletes with a previous concussion display associated behavioural changes during a 90°-collision avoidance task with an approaching pedestrian?
Thirteen athletes (ATH; 9 females, 23 ± 4years) and 13 athletes with a previous concussion (CONC; 9 females, 22 ± 3 years, concussion <6 months) walked at a comfortable walking speed along a 12.6 m pathway while avoiding another athlete on a 90º-collision course. Each participant randomly interacted with individuals from the same group 20 times and interacted with individuals from the opposite group 21 times. Minimum predicted distance (mpd) was used to examine collision avoidance behaviours between ATH and CONC groups.
The overall progression of mpd(t) did not differ between groups (p > .05). During the collision avoidance task, previously concussed athletes contributed less when passing second compared to their peers(p < .001). When two previously concussed athletes were on a collision course, there was a greater amount of variability resulting in inappropriate adaptive behaviours.
Although successful at avoiding a collision with an approaching athlete, previously concussed athletes exhibit behavioural changes manifesting in riskier behaviours. The current findings suggest that previously concussed athletes possess behavioural changes even after being cleared to returned to sport, which may increase their risk of a subsequent injury when playing.
尽管经医生允许重返运动，但曾遭受脑震荡的个体经常表现出相关的平衡控制缺陷和视动障碍。这种视动障碍可以在涉及两个行人之间相互适应的避碰任务中突显出来。然而，在重返运动后，还没有研究在日常避碰任务中挑战有先前脑震荡的运动员。
在与迎面而来的行人进行 90°避碰任务时，有先前脑震荡的运动员是否表现出相关的行为变化？
13 名运动员（ATH；9 名女性，23±4 岁）和 13 名有先前脑震荡的运动员（CONC；9 名女性，22±3 岁，脑震荡<6 个月）以舒适的步行速度沿 12.6 米的路径行走，同时避开另一名在 90°碰撞路线上的运动员。每个参与者随机与来自同一组的 20 个人互动，与来自不同组的 21 个人互动。最小预测距离（mpd）用于检查 ATH 和 CONC 组之间的避碰行为。
两组之间的 mpd(t)总体进展没有差异（p>0.05）。在避碰任务中，与同龄人相比，先前脑震荡的运动员在第二次通过时贡献较少（p<0.001）。当两个先前脑震荡的运动员在碰撞路线上时，会有更大的变化量，导致不适当的适应行为。
尽管成功避免了与迎面而来的运动员发生碰撞，但先前脑震荡的运动员表现出行为变化，表现出更危险的行为。目前的研究结果表明，即使在获准重返运动后，先前脑震荡的运动员仍存在行为变化，这可能会增加他们在运动时再次受伤的风险。
