Strength Training

Strength Training in Young Athletes

David L. Marshall, MD



With the rise in the number of youth participating in competitive sports at younger ages, the issue of weight training and safety often comes up.  Here are some answers to common questions regarding weight training and youth.


  1. How old should my child be before      he/she starts lifting weights?


  1. Children      can safely participate in weight training (resistance training with      weights) as early as 7or 8.  This is      the age where most kids have developed the balance and coordination to train      safely.


  1. Will children get stronger if the lift      weights before puberty?


  1. Yes.  Even though you may not notice an      increase in muscle size before puberty, studies have shown that children      can achieve 30-40% gains in strength from weight training.  They do not have the pubertal hormones      circulating before puberty, so the gains in strength occur from      improvements in neuromuscular recruitment, muscle memory.  Tasks usually get easier to perform if they      are repeated.   In other words, the muscles get smarter,      not necessarily larger.


  1. Can they injure their growth plates      with weightlifting?


  1. Only      if certain rules are not followed.       Because the growth plates at the ends of the long bones are made of      growing cartilage, they are not as strong as bone.  The growth plates are susceptible to      compressive forces and shear forces that may occur during very heavy lifts      or “maxing out.”  Therefore, it is      recommended that while the child is still growing (usually age 16-17 in      girls and 17-18 in boys), they should avoid single rep maximum lifts.


  1. How often should they lift?


  1. They      should lift 2-3 times per week, not on consecutive days.  Workouts should consist of 2-3 sets of      exercise focusing on the large muscle groups.  Each set should contain 10-15 reps.  When the child can perform 3 sets of 15      reps with relative ease, they can increase the weight 5-10%.

They should incorporate 20-30 minutes of aerobic or endurance training into the workout and on off days.

Remember to stretch between sets.


  1. Is it safe for girls to lift      weights?  If so, will they develop      large muscles?


  1. It is      safe for boys and girls to train with weights.  Before puberty, the strength gains in      boys and girls are equal, but after puberty, the gains seen in boys are      greater due to the higher levels of circulating testosterone.

Because of the lower levels of testosterone, girls will not develop the muscle enlargement or hypertrophy seen in boys.


  1. Is powerlifting or Olympic style      lifting safe?


Because these types of lifting involve lifting maximum amounts of weight, it is not recommended until the growth plates close at the end of pubertal development.


Here are some other weightlifting tips

  1. Never lift alone.
  2. Keep a workout log to monitor progress.  Don’t compete with your partner.
  3. Include a 10-15 minute warm-up and cool-down.
  4. Stretch, stretch, stretch.
  5. No gum chewing.
  6. Wear non-slip soled shoes.
  7. No jewelry.
  8. Exhale during reps.  Do not hold you breath and NEVER hyperventilate before a lift.
  9. Stay hydrated before, during and after workouts.
  10.  Remember that strength training should be one part of a general fitness program.  Lifting weights alone will not make you a better athlete.  Proper nutrition, hydration, rest, practice and technique are just as important for performance enhancement as building strength.