Park Sihwa, Park Sang-Kyun, Jee Yong-Seok
Research Institute of Sports and Industry Science, Hanseo University, Seosan, Korea.
Department of Physical Education, Chungnam National University, Daejeon, Korea.
J Exerc Rehabil. 2023 Feb 23;19(1):45-56. doi: 10.12965/jer.2244512.256. eCollection 2023 Feb.
This study aimed to examine whether compared with a program without walking, intervention programs with three types of walking can improve the muscle property and immunocytes in elderly women. Thirty-two subjects were randomly assigned to control group (CON), slow walking group (SWG), moderate walking group (MWG), and fast walking group (FWG). Three types of walking on treadmill were 30 min a day, 5 days/wk for 12 weeks. Muscle contraction time (Tc), maximum displacement (Dm), and immunocytes were tested by tensiomyography and flow cytometry. After the intervention, FWG had an increasing tendency in the muscle mass compared with other three groups. Tc of biceps femoris (BF) decreased in CON and SWG, while Tc of BF in MWG and FWG (30.58%±23.71%) increased. It was similar in the rectus femoris (RF). Although Dm of BF and RF increased in CON and SWG, those decreased in MWG and FWG. Leucocytes of CON and SWG had a decreasing tendency, those of MWG (9.65%±13.01%) and FWG (13.01%± 13.58%) increased. In the neutrophil, only CON decreased, whereas the three groups showed an increasing tendency. Helper T cell was increased only in FWG (19.61%±19.94%), showing significant differences between groups (=0.009, =0.378). Natural killer cell was improved in SWG and MWG but showed a clear increase in FWG (75.76%±63.57%). It might be confirmed that walking for elderly increases the muscle property of the lower legs as they walk faster, which might be expected to improve the immunocytes function.
本研究旨在探讨与无步行训练的项目相比，三种不同步行训练项目是否能改善老年女性的肌肉特性和免疫细胞。32名受试者被随机分为对照组（CON）、慢走组（SWG）、适度步行组（MWG）和快走组（FWG）。三种步行训练在跑步机上进行，每天30分钟，每周5天，共12周。通过张力肌电图和流式细胞术检测肌肉收缩时间（Tc）、最大位移（Dm）和免疫细胞。干预后，与其他三组相比，FWG的肌肉质量有增加趋势。CON组和SWG组股二头肌（BF）的Tc降低，而MWG组和FWG组BF的Tc增加（30.58%±23.71%）。股直肌（RF）情况类似。虽然CON组和SWG组BF和RF的Dm增加，但MWG组和FWG组的Dm降低。CON组和SWG组的白细胞有减少趋势，MWG组（9.65%±13.01%）和FWG组（13.01%±13.58%）的白细胞增加。在中性粒细胞方面，只有CON组减少，而其他三组呈增加趋势。辅助性T细胞仅在FWG组增加（19.61%±19.94%），组间差异有统计学意义（=0.009，=0.378）。自然杀伤细胞在SWG组和MWG组有所改善，但在FWG组有明显增加（75.76%±63.57%）。可以证实，老年人步行速度越快，小腿肌肉特性增强，这可能有望改善免疫细胞功能。
