Sharie Phelan

I am an extremely enthusiastic fitness person.  I used to teach aerobics awhile ago.  Now, I just do a lot...I run, bike, do stairs, brisk walk, yoga and some swimming.  As I close in on retirement, I am planning for something to keep me occupied and fit when I transition.  I am looking for guidance from someone like you.  I can get certified in a lot ofdifferent things so I am asking for guidance, where would some one my age, best be suited?  What would I best get certified in?  I have some ideas for fitness vacations, but I am looking to see what is out there.  Any advice you can give me would be awesome.  Thanks in advanc.