Starting a fitness or sport performance program for youth can begin as early as 10 yrs old.  The athlete pictured is 17 yrs old.  He started weight training at 10.  Starting with body weight calistenics and playing multiple sports. He has progressed remarkedly.  He started using resistance exercises utilizing medicine balls and light pulley exercises at 12 yrs old. At 14 yrs old he progressed to lifting in the bench press squats overhead lifts. At 17 at 6 foot 3 and 260lbs.  He still is growing and has remarkable speed and flexibility. He dispels the myths about youth weight training. He also has a master strength and conditioning expert monitoring his nutrition and exercise protocols.   Stay stronger !