When to Introduce Strength Training to Kids

Good Morning, I have an 11 year old son who plays tackle football, as well as other sports. In looking at all of your training programs, I notice that "Bedrock" seems to imply that high school freshman is the starting point. I am curious if you have a thought/philosophy on the appropriateness of having someone that young begin a program, or if simply playing and playing sports at that age is enough. Thanks, [...]