Context: Manual wheelchair users must be able to carry out wheelies in order to tackle obstacles in the outdoor environment. To date, no studies have compared balance variables and forces exerted on the handrim during a stationary wheelie between able bodied and spinal cord injury subjects.

Objectives: To compare the distribution of forces applied to the handrim and the center of pressure displacement during a stationary wheelie between able-bodied (AB) subjects and manual wheelchair users with spinal cord injury (SCI).

Design: Prospective experimental study.

Setting: A university hospital laboratory.

Participants: 27 participants (14 AB and 13 SCI).

Outcome Measure: Each participant performed 3 stationary wheelies of 60 s duration using a wheelchair equipped with an instrumented wheel. Two force platforms were used to calculate the displacement of the center of pressure (DCOP).

Results: Median group DCOP amplitude in the anteroposterior axis was smaller and less variable in the AB (19.6 mm [8.1,49.6]) than the SCI (14.9 mm [7.6,141.1]) group. Forces applied to the handrim only differed significantly between the AB (6 N [−13.8,16.6]) and SCI groups (2.7 N [−12.1 21.9]) in the posteroanterior axis.

Conclusions: The results showed that the participants with SCI exerted greater PA forces on the handrim, moreover, the direction of force was opposite to that of the AB group, suggesting that the SCI group used a proactive balance strategy while the AB group used a retroactive strategy. The results suggest that the direction of force applied should be considered when teaching individuals to perform wheelies.

背景：手动轮椅使用者必须能够进行轮椅，以解决户外环境中的障碍物。迄今为止，还没有研究比较身体健全和脊髓损伤受试者在静止轮滑期间施加在手轮上的平衡变量和力。

目的：比较身体健全 (AB) 受试者和脊髓损伤 (SCI) 手动轮椅使用者在静止轮椅期间施加于手轮的力分布和压力位移中心。

设计：前瞻性实验研究。

地点：大学医院实验室。

参与者： 27 名参与者（14 名 AB 和 13 名 SCI）。

结果测量：每位参与者使用配备有仪表轮的轮椅进行 3 次持续时间为 60 秒的固定轮式。使用两个力平台来计算压力中心的位移（DCOP）。

结果：与 SCI（14.9 mm [7.6,141.1]）组相比，AB 组（19.6 mm [8.1,49.6]）的中位组前后轴 DCOP 幅度更小且变化更小。施加到手轮的力仅在 AB（6 N [-13.8,16.6]）和 SCI 组（2.7 N [-12.1 21.9]）之间在后前轴上有显着差异。

结_战略。结果表明，在教个人进行带轮运动时，应考虑施加的力的方向。