Athletic skills and movement requirements like running speed, vertical jump capability, and throwing speed are just some of the athletic components that will improve after the application of general strength training. (strengthtrainingendeavors.com)
There is no minimal age requirement for general strength training, but it is recommended the athlete can be demonstrate maturity following directions and has adequate balance (developmentally usually ages 7 - 8). (sportstarsmag.com)
These simple techniques can be done for bodybuilding, athletics, and or just general strength training. (varietytrainer.com)