Do not over-train their Stamina or Speed yet. Focus 70% on Technique and Dribbling. Because they will grow for 15 years, they need a solid technical base. Play them as a substitute for 20 minutes per match.
In PES 2013, players develop "Team Roles" (Legend, Master, Leader, etc.) around age 30. These roles boost the development of younger players. "Full" players enter this mentorship phase at 30 and remain there until 40. A single "Full" Legend can nurture three generations of youth products. pes 2013 growth type full
Every time you sell a declining star and buy a new wonderkid, your Team Chemistry drops. With a "Full" core, you build a dynasty. Your back four and central midfield can play together for 15 seasons, reaching 99/99 chemistry. Strategic Advice: High risk, short-term reward
The biggest regret Master League players write about on forums is selling a "Growth Type Full" player at 33 to "cash in." Do not over-train their Stamina or Speed yet
Do not do this.
A Standard player at 33 is a depreciating asset. A Full player at 33 is a mature asset. Keep them until they naturally retire. They will become your club's all-time top scorer. In fact, the "Full" type often leads to the "Legend" status trigger in Master League faster than any other curve.