Ozdemir Berk Can, Savci Sema, Tanriverdi Aylin, Ozcan Kahraman Buse, Isguder Rana, Makay Balahan, Unsal Erbil
Health Science Institute, Dokuz Eylul University, Izmir, Turkey.
Faculty of Physical Therapy and Rehabilitation, Dokuz Eylul University, Izmir, Turkey.
Z Rheumatol. 2024 Feb;83(Suppl 1):71-77. doi: 10.1007/s00393-023-01340-7. Epub 2023 Apr 3.
One of the most frequently discussed physical parameters in juvenile idiopathic arthritis (JIA) is physical activity level. There is limited evidence about determinants of physical activity level in JIA. In this study, we aimed to investigate the determinants of physical activity level in children and adolescents with JIA.
Thirty-two JIA patients and 18 age- and sex-matched healthy individuals were included in the study. The age range was 8-18 years. Sociodemographic and clinical data of the participants were recorded. In both groups, anthropometry, fatigue, pain, knee extension muscle strength, gait variables, functional exercise capacity assessed by six-minute walk test (6MWT), and arterial stiffness were evaluated. Physical activity level was assessed by an accelerometer.
The disease activity level of the patients was low. Pain and fatigue scores were significantly higher in the JIA group compared to healthy controls (p < 0.05). Walking speed, physical activity level, time spent in low-intensity physical activity, time spent in moderate-to-vigorous-intensity physical activity, and 6MWT distance were significantly lower than in healthy controls (p < 0.05). Quadriceps muscle strength and arterial stiffness assessment results were similar in both groups (p > 0.05). In the JIA group, there was a positive correlation between physical activity and age, height, fat-free body mass, quadriceps muscle strength, and 6MWT distance (p < 0.05). Also, there was a negative correlation between physical activity and pain, fatigue, and cadence. Physical activity level was independently associated with 6MWT distance (42.9% of the variability).
In mildly affected JIA patients, gait speed, functional exercise capacity, and physical activity level are affected. Functional exercise capacity is a determinant of physical activity level in JIA.
青少年特发性关节炎（JIA）中讨论最频繁的身体参数之一是身体活动水平。关于JIA患者身体活动水平的决定因素，证据有限。在本研究中，我们旨在调查JIA儿童和青少年身体活动水平的决定因素。
本研究纳入了32例JIA患者和18例年龄及性别匹配的健康个体。年龄范围为8至18岁。记录参与者的社会人口统计学和临床数据。对两组均评估了人体测量学指标、疲劳、疼痛、膝关节伸展肌力、步态变量、通过六分钟步行试验（6MWT）评估的功能运动能力以及动脉僵硬度。通过加速度计评估身体活动水平。
患者的疾病活动水平较低。与健康对照组相比，JIA组的疼痛和疲劳评分显著更高（p<0.05）。步行速度、身体活动水平、低强度身体活动时间、中度至剧烈强度身体活动时间以及6MWT距离均显著低于健康对照组（p<0.05）。两组的股四头肌力量和动脉僵硬度评估结果相似（p>0.05）。在JIA组中，身体活动与年龄、身高、去脂体重、股四头肌力量和6MWT距离呈正相关（p<0.05）。此外，身体活动与疼痛、疲劳和步频呈负相关。身体活动水平与6MWT距离独立相关（变异的42.9%）。
在病情轻度受影响的JIA患者中，步态速度、功能运动能力和身体活动水平受到影响。功能运动能力是JIA患者身体活动水平的一个决定因素。
