Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway.
Faculty of Technology, Art and Design, Oslo Metropolitan University, Oslo, Norway.
Prosthet Orthot Int. 2021 Aug 1;45(4):343-349. doi: 10.1097/PXR.0000000000000024.
Previous studies show that people with lower limb amputation (LLA) have a sedentary lifestyle, reduced walking capacity, and low cardiorespiratory fitness (VO2peak). There is, however, no knowledge on the relationship between cardiorespiratory fitness and objectively measured level of physical activity in daily life.
To investigate the relationship between upper-body VO2peak, physical activity levels, and walking capacity in persons with LLA.
Correlational and descriptive study.
Fourteen participants with LLA performed an assessment of VO2peak on an arm-crank ergometer and walking capacity (preferred walking speed and 2-minute walking test). Level of physical activity was measured over 7 days with a step activity monitor (number of steps; sedentary time; and proportion of low-intensity, moderate-intensity, high-intensity, and peak-intensity activity level).
VO2peak correlated significantly with number of steps per day (r = 0.696, p = 0.006), sedentary time (r = -0.618, p = 0.019), high-intensity activity level (r = 0.769, p = 0.001), and peak-intensity activity level (r = 0.674, p = 0.008). After correcting for age, correlations were still large and significant. Large correlations were also found between VO2peak, preferred walking speed (r = 0.586, p = 0.027), and 2-minute walking test (r = 0.649, p = 0.012).
We provide the first evidence of the strong relationships between upper-body VO2peak, sedentary behavior, high-intensity activity level, and walking capacity in persons with LLA. Further research is needed to investigate the potential effect of upper-body cardiorespiratory fitness on the level of activity in daily life, or vice versa.
先前的研究表明，下肢截肢（LLA）患者的生活方式久坐不动，行走能力下降，心肺功能（VO2peak）较低。但是，对于心肺功能与日常生活中身体活动的客观测量水平之间的关系，尚无任何了解。
调查LLA 患者上肢 VO2peak、身体活动水平和行走能力之间的关系。
相关性和描述性研究。
14 名 LLA 患者在手摇曲柄测功计上进行 VO2peak 评估，以及行走能力（首选行走速度和 2 分钟步行测试）。使用步活动监测器（步数；久坐时间；低强度、中强度、高强度和峰值强度活动水平的比例）在 7 天内测量身体活动水平。
VO2peak 与每天的步数呈显著相关（r = 0.696，p = 0.006），与久坐时间呈负相关（r = -0.618，p = 0.019），与高强度活动水平呈显著相关（r = 0.769，p = 0.001），与峰值强度活动水平呈显著相关（r = 0.674，p = 0.008）。校正年龄后，相关性仍然很大且具有统计学意义。VO2peak 与首选行走速度（r = 0.586，p = 0.027）和 2 分钟步行测试（r = 0.649，p = 0.012）也存在较大相关性。
我们首次提供了证据，证明上肢 VO2peak、久坐行为、高强度活动水平和 LLA 患者行走能力之间存在很强的关系。需要进一步的研究来调查上肢心肺功能对日常生活中活动水平的潜在影响，或者反之亦然。
