Objective

To investigate upper limb (UL) energy demand during unilateral arm crank submaximal exercise testing in individuals with stroke compared with healthy controls and the relationship between UL energy demand and UL activity in individuals with stroke.

Design

Cross-sectional, observational study.

Setting

Research laboratory.

Participants

Individuals with chronic stroke (n=14) and controls (n=12), matched for age, sex, and body mass index (N=26).

Interventions

Not applicable.

Main Outcome Measures

UL energy demand was measured as peak oxygen consumption (V̇o₂)/peak load during unilateral arm crank submaximal exercise testing. UL activity was measured using the Box and Block Test (BBT) and Grooved Pegboard Test (GPT).

Results

The energy demand of the paretic side compared with the nonparetic side of the stroke group was 0.43 mL/kg/min/W (95% confidence interval, 0.03-0.83, P=.005) greater than the dominant compared with the nondominant side of the control group. The median difference between sides in peak V̇o₂/peak load was 52% for the group with stroke compared with 11% for the control group. Positive correlations between the median percentage difference between the paretic and the nonparetic side of peak V̇o₂/peak load and BBT were 0.72 (P=.004) and of V̇o₂/peak load and GPT was 0.77 (P=.002).

Conclusions

The higher energy demand of the paretic UL during unilateral arm crank submaximal exercise testing than the nonparetic and both UL of the controls together with the strong relationship between energy demand and UL activity suggest that the energy demand of the paretic UL has the potential to affect real-life UL activity after stroke.

中文翻译：

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慢性中风患者单侧手臂曲柄次极量运动测试期间的上肢能量需求

客观的

与健康对照组相比，研究卒中患者单侧手臂曲柄次极量运动测试期间的上肢 (UL) 能量需求，以及卒中患者的 UL 能量需求与 UL 活动之间的关系。

设计

横断面、观察性研究。

环境

研究实验室。

参与者

患有慢性中风的个体 (n=14) 和对照组 (n=12)，年龄、性别和体重指数匹配 (N=26)。

干预

不适用。

主要观察指标

在单侧手臂曲柄次最大运动测试期间，UL 能量需求被测量为峰值耗氧量 (V̇ o ₂ )/峰值负荷。UL 活性是使用 Box and Block Test (BBT) 和 Grooved Pegboard Test (GPT) 测量的。

结果

脑卒中组瘫痪侧与非瘫痪侧的能量需求为 0.43 mL/kg/min/W (95% CI, 0.03-0.83, P =.005)对照组。中风组的峰值 V̇ o ₂ /峰值负荷两侧之间的中位数差异为 52%，而对照组为 11%。峰值 V̇ o ₂ /峰值负荷和 BBT的瘫痪侧和非瘫痪侧之间的中位数百分比差异之间的正相关为 0.72 ( P =.004) 和 V̇ o ₂ /峰值负荷和 GPT 之间的正相关为 0.77 ( P =.002) .

结论

在单侧手臂曲柄次极量运动测试期间，瘫痪 UL 的能量需求高于非瘫痪和对照组的两个 UL，以及能量需求和 UL 活动之间的密切关系表明，瘫痪 UL 的能量需求有可能影响真实- 中风后的 UL 活动。