Skip to main content

Table 4 Dynamic muscle strength (1-RM) in SLE patients and controls*

From: Low dynamic muscle strength and its associations with fatigue, functional performance, and quality of life in premenopausal patients with systemic lupus erythematosus and low disease activity: a case–control study

Variable (1-RM) SLE CONTROLS Difference between means P-value
(n = 25) (n = 25) (95% CI)#
Leg press, kg 71.1 ± 18.6 95.6 ± 19.7 24.5 (13.6; 35.5) < 0.0001
Leg extension, kg 64.7 ± 10.6 72.9 ± 13.9 8.1 (1.1; 15.2) 0.0242
Leg curl, kg 30.2 ± 5.2 35.8 ± 6.9 5.6 (2.1; 9.1) 0.0022
Chest press, kg 34.7 ± 7.2 43.1 ± 7.9 8.4 (4.1; 12.7) 0.0002
Lat pulldown, kg 36.2 ± 6.4 41.8 ± 5.8 5.6 (2.2; 9.1) 0.0019
1-RM-total, kg 47.4 ± 8.1 57.8 ± 8.7 10.4 (5.7; 15.0) < 0.0001
1-RM-total, kg/kg of body weight 0.8 ± 0.1 1.0 ± 0.1 0.2 (0.1; 0.2) < 0.0001
  1. * These values are expressed as the mean SD unless otherwise stated. † These variables are not normally distributed and therefore, are expressed as median. # Calculated only when Student’s t-test was used. SLE = systemic lupus erythematosus; CI = confidence interval of 95%; 1-RM = 1-RM consists of performing a full range of motion with the greatest possible load; 1-RM -total = sum of total load lifted in the 1-RM tests (i.e., leg press, leg extension, leg curl, chest press, and lat pulldown); 1-RM-total, kg/kg of body weight = median of the sum of the load of the 1-RM tests in leg press, leg extension, leg curl, chest press, and lat pulldown divided by body weight.