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Related Experiment Video

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Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Evaluation of Left Ventricular Structure and Function using 3D Echocardiography

Published on: October 28, 2020

Weight lifting training and left ventricular function in adolescent subjects.

M Sagiv¹, M Sagiv, D Ben-Sira

¹Sports Medicine and Rehabilitation Division, The Zinman College, Wingate, Israel. sagiv@wincol.ac.il

The Journal of Sports Medicine and Physical Fitness

|July 21, 2007

Summary

Endurance and weight lifting training impact adolescent boys' heart function differently. Running improved left ventricular contractility and maximal oxygen uptake more than weight lifting.

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Area of Science:

Cardiology
Sports Medicine
Adolescent Physiology

Background:

Exercise training in adolescence can alter myocardial adaptation.
Left ventricular (LV) function responses to exercise vary based on pressure or volume overload.
Understanding these differences is crucial for optimizing training regimens in young athletes.

Purpose of the Study:

To investigate the effects of endurance (running) versus weight lifting training on left ventricular contractility in healthy adolescent boys.
To compare echocardiographic findings between different training modalities and a control group.

Main Methods:

Sixty healthy adolescent boys were randomized into three groups: weightlifting, running, and control.
Training programs lasted 28 weeks, with 3-4 sessions per week.
Weightlifting involved dynamic resistance machines at 6-repetition maximum; running involved aerobic exercise at 65% of VO2max.

Main Results:

Running training significantly improved end-diastolic volume and end-systolic pressure-volume ratio at rest.
At peak exercise, runners showed enhanced wall stress, end-systolic pressure-volume ratio, and ejection fraction compared to weightlifters.
Maximal oxygen uptake (VO2max) significantly improved in runners, with higher maximal load in both training groups versus controls.

Conclusions:

Exercise training mode significantly influences left ventricular function and contractility in adolescent boys.
Observed differences are attributed to volume-after-load relationships, not fundamental myocardial property changes.
This highlights the importance of considering training type for cardiovascular adaptations in adolescents.