This study aims to more accurately assess cardiac function, ventilation and exercise capacity in a non-invasive fashion, and to better characterize exercise intolerance in the setting of three populations of individuals with chronic diseases of childhood (acute lymphoblastic leukemia (ALL), chronic lung disease (CLD) of prematurity, and post-heart transplant (HT))
Physical activity in childhood is an integral part of maintaining health and quality of life. Children who participate in routine physical activity are more likely to maintain a healthy body weight and are less likely to have heart disease, type 2 diabetes and high blood pressure as adults. Children with chronic disease are often limited from full participation in exercise for various reasons -perceived physical limitations, either from the patient and family or from their medical provider, or because of symptoms which cause exercise to feel uncomfortable. As the number of children living and aging with chronic disease continues to grow, the researchers are hoping to expand the current exercise testing capabilities for both clinical care and research in order to (i) provide data to permit formulation of evidence-based guidelines for exercise in chronic childhood disease; (ii) improve understanding of limitations to exercise in this growing population; (iii) learn long-term implications of chronic childhood disease as these individuals enter adulthood.
Study Type
OBSERVATIONAL
Enrollment
90
Participant Reported Physical Activity and Outcomes (completed via REDCap or on paper)
Masonic Cancer Center
Minneapolis, Minnesota, United States
RECRUITINGMeasure of Peak O2 intake during test exercise
Maximal cardiopulmonary exercise testing (CPX) will be completed on cycle ergometer to determine peak oxygen uptake, a measure of cardiorespiratory fitness
Time frame: 3-4 hours during the onetime study visit day
Measure of Cardiac output during test exercise
Cardiac output is measured using C2H2 open-circuit breathing technique: a mass spectrometer medical gas analyzer will measure gas concentration continuously, yielding serial Stroke Volume measurements during incremental exercise. Cardiac output is the product of heart rate and stroke volume
Time frame: 3-4 hours during the onetime study visit day
The proportion of expiratory flow limitation (EFL)
The proportion of expiratory flow limitation (EFL) during exercise while tracking dyspnea and perceived exertion
Time frame: 3-4 hours during the onetime study visit day
Association between cardiac function and patient reported outcomes of perceived fitness
Logistic regression will be used to understand associations between cardiac function and patient reported outcomes of perceived fitness
Time frame: 3-4 hours during the onetime study visit day
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