Strength training for prepubescent males: is it safe?

Area of Science:

• Pediatric Exercise Science
• Sports Medicine
• Human Physiology

Background:

• Assessing the safety and efficacy of strength training in prepubescent children is crucial for guiding youth athletic development.
• Previous research has yielded mixed results regarding the impact of resistance training on young athletes' physical development and injury risk.

Purpose of the Study:

• To evaluate the safety and effectiveness of a supervised, concentric-focused strength training program in prepubescent males.
• To investigate the effects of this training on strength, growth, development, flexibility, and motor performance.

Main Methods:

• Eighteen prepubescent males (average age 8.3 years) underwent a 14-week supervised strength training program (3 sessions/week).
• Safety was assessed via injury surveillance, physiological monitoring (blood pressure, heart rate), scintigraphy, and creatine phosphokinase levels.
• Strength gains were measured using KinCom analysis, compared against an age, sex, and activity-matched control group.

Main Results:

• Significant strength gains were observed in the training group (P < 0.05), while the control group showed no improvement.
• The training program exhibited a low injury rate.
• No adverse effects were noted on bone, muscle, epiphyses, growth, development, flexibility, or motor performance in the short term.

Conclusions:

• Supervised concentric strength training can lead to strength improvements in prepubescent males without compromising physical development or increasing injury risk in the short term.
• The multifaceted nature of safety necessitates further research before concluding uniform safety for all prepubescent strength training.
• This study provides evidence supporting the potential benefits of structured, supervised strength training for young athletes.