WINDOWS OF TRAINABILITY: SPEED Windows of trainability are periods in a youth athlete's life when certain athletic attributes are more easily developed than others. Speed and explosiveness is more easily developed. Age ranges can vary significantly for any given athlete based on their physiological maturity. For speed, the high school years are incredibly important. Athletes can improve speed immensely. Strength gains are important too but those are also easily built in college, whereas speed gains only get tougher to acquire as athletes age. #trainforspeed #speedkills