PMID: 11908559Mar 23, 2002Paper

Aerobic fitness, fatigue, and physical disability in systemic lupus erythematosus

The Journal of Rheumatology
Colin TenchD P D'Cruz

Abstract

To measure aerobic fitness, muscle strength, fatigue, and physical disability in patients with systemic lupus erythematosus (SLE). Ninety-three patients with SLE and 41 sedentary controls were recruited into the study. Aerobic fitness was assessed by monitoring peak and submaximal oxygen uptake, heart rate, duration of exercise, and perceived exertion during a treadmill-walking test. Strength was measured using voluntary isometric quadriceps contraction. Symptomatic measures included physical and mental fatigue, mood, sleep, and functional incapacity. Compared to sedentary controls patients with SLE had significantly reduced levels of aerobic fitness (mean VO2peak SLE patients, 23.2 ml/kg/min vs controls, 29.6 ml/kg/min; p < 0.001) and reduced exercise capacity (mean exercise duration SLE patients, 10.4 min vs controls, 13.1 min; p < 0.001). The SLE patients also had reduced muscle strength (mean maximum voluntary quadriceps contraction SLE patients, 298 N vs controls, 376 N; p = 0.003). Resting lung function was also significantly worse in the SLE patients (mean FEV, SLE patients, 2.6 l vs controls, 2.9 l; p = 0.002). Fatigue (p < 0.001), depressed mood (p < 0.001), poor sleep quality (p < 0.001), and functional incapacity (p ...Continue Reading

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