Bodyweight Exercise of Lower and Upper Extremities for Female Patients with Rheumatoid Arthritis and the Timed Up-and-Go Test

Abstract

At our hospital, orthopedic surgeons and physical and occupational therapists have developed bodyweight exercises for the lower and upper extremities (BELU) for rheumatoid arthritis (RA) patients, including walking [Timed Up-and-Go (TUG) test and figure-of-eight walking) and weight exercises. We aimed to clarify the effect of bodyweight exercise and the Health Assessment Questionnaire (HAQ) cut-off value for a TUG test result of 12 s (or longer) as a risk factor for a fall. Methods: All patients underwent BELU twice weekly at home for 6 weeks. We assessed the HAQ score, TUG time, and the strengths of quadriceps femoris, biceps brachii, handgrip, side pinch, and pulp pinch before and after the intervention. Results: We analyzed the data of 42 participants. The mean age was 67.0 ± 12.1 years. The mean Disease Activity Score-28 for rheumatoid arthritis with erythrocyte sedimentation rate was 2.91 ± 0.91. The mean HAQ score was 0.69 ± 0.62. The dominant quadriceps femoris, biceps brachii, pulp pinch, and side pinch strengths were significantly strengthened. TUG time was improved from 9.0 ± 3.0 s to 8.6 ± 3.2 s (P=0.009). The receiver operating characteristic analysis revealed the cut-off value of HAQ for a TUG time of 12 s (or longer) was 1.0 (AUC 0.903, 95% confidence interval 0.792-1.0). Conclusions: Bodyweight exercises strengthened the muscles in female patients with RA, resulting in improved TUG test results. An indicative HAQ cut-off value of 1.0 (or greater) was identified for a TUG test result of 12 s or longer.