Prep. - 90% Spinning and Swimming...

Sounds like you are on the right track!  Congrats, and keep up the good work!

So here's my story. I was a college basketball player in the 90's. Major spine surgery last year was in athletic no man's land. My buddy a  2 time Iron Man was putting together a spin class. After weeks of dodging his invitation's I finally relented. The first class was brutal could not hold my own weight on my leg's. I was to heavy at 242 lb.'s. Started eating better oatmeal and salads and a reasonable dinner. Started running after putting the children to bed. Could not make a mile on my first run. The next time out i aimed to run just a little bit further then my last time out. My second week went better lost 8 lb.'s and it helped my spin and running. In the end of my second week I ran in  a community 5k. My first road race in 20 years. I ran it in 27 minutes. I was happy. The beginning of the third week I really felt great i went on line and and found a sprint Tri in my area. !/4 swim, 12 bike , 5k. Just one problem i never really swam before. I ordered a wetsuit and swam after work almost every night after work in the ocean in Rockaway N.Y. I taught myself how to breathe in the open water. Take breath's away from the waves. Also trust the floatation  the suit gives you. So here it is Big week four, I lost a total of 20 lbs, the wendsday before my first try The hour spin class was intense all up hill climb. The rest of the week was just for R and R. Race day came and all the athlete's looked like machines and I wondered do I belong here? The end result was this. I did the swim in 9:40 the bike in 37 min and the run in 26 min. a total time of 1:18 and change. was 270 out of 500 overall and out of 80 in my age group I was 12. You be the judge how i did. But I a few times in my life playing hoops i scored 40 points in a game and my first Tri blew that out of the water. I am Happy. BTW try Nike Air Max they are amazing for my back in the run. They have a clear acrylic cushion from the toes to the heel it really works great,