The exercise electrocardiogram in trained and untrained adolescent males

Area of Science:

• Cardiology
• Sports Medicine
• Pediatric Health

Background:

• Normal exercise electrocardiogram (Ex ECG) responses in adolescent males are not well-defined.
• Understanding adolescent Ex ECGs is crucial for differentiating normal physiological adaptations from potential cardiac abnormalities.

Purpose of the Study:

• To investigate differences in Ex ECG parameters between trained and untrained adolescent males.
• To compare adolescent Ex ECG responses to those typically observed in adult males.
• To determine the influence of physical training on adolescent Ex ECG findings.

Main Methods:

• Exercise electrocardiograms (Ex ECG) were conducted on trained and untrained adolescent males.
• Exercise involved a bicycle ergometer with an intermittent workload protocol.
• Analysis focused on J-point displacement and ST segment slope during maximal exercise.

Main Results:

• No J-point depression was observed in any adolescent subjects during exercise.
• A positive ST segment slope was consistently noted.
• No significant differences in J-point displacement or ST segment slope were found between trained and untrained groups.

Conclusions:

• The absence of J-point depression during exercise in this cohort suggests it may be an indicator of abnormality in adolescent males.
• Physical training status does not appear to influence J-point or ST segment responses at maximal exercise in adolescents.