Evaluation of Respiratory Function, Respiratory Muscle Strength, Physical Activity, and Functionality in Patients with Lower Extremity Lymphedema

<b><i>Background:</i></b> Lymphedema is a chronic, progressive condition that has major physical and psychological consequences. It was aimed to examine the respiratory functions, respiratory muscle strength, physical activity level, and functionality of patients with lower extremity lymphedema and to compare them with healthy controls. <b><i>Methods and Results:</i></b> A total of 82 individuals (29.3% male, 70.7% female, with a mean age of 49.89 ± 15.07 years) with lower extremity lymphedema (Group 1) and healthy individuals (Group 2) were included. Respiratory functions of the participants were evaluated by spirometry, respiratory muscle strength by maximum oral pressure measurements, physical activity levels using the International Physical Activity Questionnaire-Short Form (IPAQ-SF), functionality by Lower Extremity Functional Scale (LEFS) and Timed Up and Go test (TUG test). All respiratory function test measurements were lower in mean Group 1 than in Group 2 (<i>p</i> < 0.05). While inspiratory muscle strength did not differ between the groups (<i>p</i> > 0.05), expiratory muscle strength was lower in Group 1 than Group 2 (<i>p</i> < 0.05). Although spent time and energy for sitting were higher in Group 1 (<i>p</i> < 0.05), IPAQ vigorous-, moderate-, and light-intensity physical activity (MET-min/week) and IPAQ-total score did not differ between groups (<i>p</i> > 0.05). In Group 1, mean of LEFS score was lower and TUG test (seconds) in Group 1 was longer compared to Group 2 (<i>p</i> < 0.05). <b><i>Conclusions:</i></b> Respiratory functions, expiratory muscle strength, and functionality in patients with lower extremity lymphedema were adversely affected; however, inspiratory muscle strength and physical activity levels were similar to those of healthy controls.