The Mayo Clinic knows a lot about health has said strength training using very light weights is Healthy for kids - when done properly.
I am not suggesting heavy weights for kids - you don’t want to damage growth plates.
Strength training can help increase a kid’s muscle strength & endurance, help protect muscles & joints from injury, improve performance in just about every sport, strengthen bones, tendons & ligaments, and boost metabolism to help kids maintain a healthy weight and improve self-esteem
I designed an on-line fitness program for kids and moms to enjoy together. I recommendkids do these exercises with one or two-pounds in each hand and moms use 3 to 5 pounds in each hand.
Healthy kids are up to you. Ask your parents about my strength training program for kids.