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Effects of propranolol and exercise training in children with severe burns
Laura J Porro1, Ahmed M Al-Mousawi, Felicia Williams
1Department of Surgery, University of Texas Medical Branch, Galveston, TX 77550, USA.
Insights
Propranolol does not hinder exercise benefits in severely burned children. This beta-blocker actually enhanced aerobic capacity (VO2 peak) in pediatric burn survivors undergoing exercise rehabilitation.
Area of Science:
- Pediatric critical care
- Rehabilitation medicine
- Pharmacology
Background:
- Severely burned children often experience muscle wasting and reduced physical function.
- Exercise training is crucial for recovery, but its efficacy alongside medications like propranolol is unclear.
Purpose of the Study:
- To determine if propranolol administration negates exercise training benefits in severely burned children.
- To assess the impact of propranolol on muscle strength, lean body mass, and aerobic capacity.
Main Methods:
- A randomized trial involving 58 severely burned children (burns ≥30% total body surface area).
- Participants underwent 12 weeks of resistance and aerobic exercise training.
- One group received propranolol, while the control group did not.
Main Results:
- Both groups showed significant improvements in muscle strength, lean body mass, and peak oxygen consumption (VO2 peak) post-exercise.
- The propranolol group exhibited a significantly greater percentage increase in VO2 peak compared to controls.
- No impairment of exercise-induced gains was observed with propranolol use.
Conclusions:
- Propranolol does not impede exercise-induced improvements in muscle mass, strength, or VO2 peak in severely burned children.
- Propranolol may enhance the aerobic response to exercise in this pediatric population.
Objectives:
To investigate whether propranolol administration blocks the benefits induced by exercise training in severely burned children.
Study Design:
Children aged 7-18 years (n = 58) with burns covering ≥30% of the total body surface area were enrolled in this randomized trial during their acute hospital admission. Twenty-seven patients were randomized to receive propranolol, whereas 31 served as untreated controls. Both groups participated in 12 weeks of in-hospital resistance and aerobic exercise training. Muscle strength, lean body mass, and peak oxygen consumption (VO2 peak) were measured before and after exercise training. Paired and unpaired Student t tests were used for within and between group comparisons, and χ(2) tests for nominal data.
Results:
Age, length of hospitalization, and total body surface area burned were similar between groups. In both groups, muscle strength, lean body mass, and VO2 peak were significantly greater after exercise training than at baseline. The percent change in VO2 peak was significantly greater in the propranolol group than in the control group (P < .05).
Conclusions:
Exercise-induced enhancements in muscle mass, strength, and VO2 peak are not impaired by propranolol. Moreover, propranolol improves the aerobic response to exercise in massively burned children.
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Exercise Stress Test
Exercise stress testing, commonly known as a treadmill test, is a noninvasive procedure used to evaluate cardiovascular function and diagnose heart conditions.
Definition
An exercise stress test measures the heart's response to exertion using a treadmill or stationary bicycle. Chest electrodes record the heart's electrical activity through an ECG, and blood pressure is monitored regularly.
Purposes
