Oyake Kazuaki, Baba Yasuto, Suda Yuki, Murayama Jun, Mochida Ayumi, Ito Yuki, Abe Honoka, Kondo Kunitsugu, Otaka Yohei, Momose Kimito
Department of Physical Therapy, School of Health Sciences, Shinshu University, Nagano, Japan.
Department of Rehabilitation Medicine, Tokyo Bay Rehabilitation Hospital, Chiba, Japan.
Ann Rehabil Med. 2021 Aug;45(4):304-313. doi: 10.5535/arm.21087. Epub 2021 Aug 30.
To examine the relationship between the time constant of oxygen uptake kinetics during the onset of exercise (τVO2) estimated from a single exercise bout and that obtained from three averaged exercise bouts in individuals with stroke.
Twenty participants with stroke performed three bouts of a constant-load pedaling exercise at approximately 80% of the workload corresponding to the ventilatory threshold to estimate τVO2. The VO2 data from the first trial of three bouts were used to estimate τVO2 for a single bout. Additionally, data collected from three bouts were ensemble-averaged to obtain τVO2 for three averaged bouts as the criterion.
There was a very high correlation between τVO2 for a single bout (34.8±14.0 seconds) and τVO2 for three averaged bouts (38.5±13.4 seconds) (r=0.926, p<0.001). However, τVO2 for a single bout was smaller than that for three averaged bouts (p=0.006).
τVO2 for a single bout could reflect the relative difference in τVO2 for three averaged bouts among individuals with stroke. However, it should be noted that τVO2 for a single bout may be underestimated compared to τVO2 for three averaged bouts.
研究中风患者单次运动试验估算的运动起始阶段摄氧量动力学时间常数（τVO2）与三次平均运动试验所得时间常数之间的关系。
20名中风患者以对应通气阈值约80%的负荷进行三轮恒定负荷蹬车运动，以估算τVO2。三轮试验中首次试验的VO2数据用于估算单次运动试验的τVO2。此外，将三轮试验收集的数据进行总体平均，以获得三次平均运动试验的τVO2作为标准值。
单次运动试验的τVO2（34.8±14.0秒）与三次平均运动试验的τVO2（38.5±13.4秒）之间存在高度相关性（r = 0.926，p<0.001）。然而，单次运动试验的τVO2小于三次平均运动试验的τVO2（p = 0.006）。
单次运动试验的τVO2可反映中风患者三次平均运动试验的τVO2个体间相对差异。然而，应注意的是，与三次平均运动试验的τVO2相比，单次运动试验的τVO2可能被低估。
