Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2007 ) 06 , 353 - 367

Review article
Trainability of Young Athletes and Overtraining
Nuno Matos, Richard J. Winsley 
Author Information
Children’s Health and Exercise Research Centre, School of Sport and Health Sciences, University of Exeter, UK

Richard J. Winsley
✉ Children’s Health and Exercise Research Centre, School Of Sport and Health Sciences, University of Exeter, St. Luke’s Campus, Heavitree, Exeter EX1 2LU, England, UK
Email: R.J.Winsley@exeter.ac.uk
Publish Date
Received: 15-03-2007
Accepted: 18-07-2007
Published (online): 01-09-2007
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ABSTRACT

Exercise adaptations to strength, anaerobic and aerobic training have been extensively studied in adults, however, young people appear to respond differently to such exercise stimulus in comparison to adults. In addition, because overtraining in young athletes has received little attention, this important area is also discussed. Resistance training in children can be safe and effective. It has the potential to improve sport performance, enhance body composition and reduce the rate of sport incurred injury. Furthermore, with the appropriate stimulus, prepubertal and adolescent athletes can show significant increments in muscle strength (13 - 30%). Children can improve anaerobic power (3%-10% Mean Power and 4%-20% in Peak Power), although the mechanisms responsible for the improvements in children remain unclear. Children show a ‘reduced’ trainability of peak VO2 in comparison to adults. Nevertheless, their aerobic power is trainable, with improvements reported at approximately 5%. Moreover, improvements in other variables like exercise economy or lactate threshold may occur without significant changes in peak VO2 The limited evidence available indicates that overtraining is occurring in young athletes (30% prevalence), highlighting the importance of further research in to all the possible contributing factors - physiological, psychological and emotional - when investigating overtraining.

Key words: Prepubertal and adolescent athletes, trainability, mechanisms, resistance training, anaerobic training, aerobic training, overtraining


           Key Points
  • Children’s strength, anaerobic and aerobic power is trainable, although the improvements may be smaller than seen in adults.
  • Children can demonstrate significant gains in muscle strength with resistance training (13 - 30%).
  • Improvements in mean power (3 - 10%) and peak power (4 - 20%) are reported in children.
  • Aerobic fitness can improve with training in children by approximately 5%.
  • Limited available evidence indicates an occurrence of overtraining in young athletes of around 30%.
 
 
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