1. This is a myth that has been disproven. Please read this NY Times article https://well.blogs.nytimes.com/2010/11/24/phys-ed-the-benefits-of-weight-training-for-kids/
about the birth of this myth and you will see that the correlation was tenuous at best from the beginning. There is no evidence that strength training will “stunt your growth.” As to the ideal age to start weight training, Dr. Faigenbaum said: “Any age is a good age. But there does seem to be something special about the time from about age 7 to 12. The nervous system is very plastic. The kids are very eager. It seems to be an ideal time to hard-wire strength gains and movement patterns.” ”
2. Strength training is wildly underutilized and desperately needed among children, especially in this country where “the percentage of children and adolescents affected by obesity has more than tripled since the 1970s. Data from 2015-2016 show that nearly 1 in 5 school age children and young people (6 to 19 years) in the United States has obesity.
3. Strength training helps prevent injuries in children who play common American sports like soccer, baseball, track and other sports especially ones that require unilateral and/or repetitive movements. For instance, children who do not squat, lunge or deadlift (properly, of course) rarely have the strength in their glutes when cutting on the playing field or track to keep their knees from caving in and tearing their ACL. Even more importantly, children who lack core strength will more often hit their head when falling or being tackled because they are not strong enough to brace against a fall or hit. During martial arts practice, when my kids fall their heads never touch the ground. When almost any other child falls you can see their head hit due to a complete lack of core strength and neuro-muscular control to help them protect themselves.
At CrossFit Destroyer we teach both children and adults how to lift properly to safely develop the strength and skills needed to live a long, healthy and productive life.