I tell you this from complete certainty.
I've always been very active and athletic and I've trained and played enough sports in my short life, and I gained benefits from them all - I achieved something else since I started actively studying and mastering different styles of Tai Chi.
There is something phenomeonal about what it does to you, seriously - you feel "vital" and full of energy, fresh and ready for anything.
I strongly recommend you start to exercise Tai Chi today - there are some simple exercises which anybody can do which perform miracles alone - do a quick search and try some.
Personally I practice "Stand-on-stake" now for 1 hour a day, and perform 30minutes of Yang and Chen style -it is calming but energising, and I swear it enhances performances in all other areas of my life too.