Triathlon Training

I've started my training for the Vancouver Triathlon that's happening on September 6. There's 2 distances you can do for this event so, as it's my first triathlon, I'll be doing the 1/2 distance. That involves a 750m ocean swim, a 19km bike ride then a 5km run. The official training groups start on May 30 but, due to my inclination for injuries, I wanted to get a head-start on things. I've already managed to complete all of the required distances individually, now I just need to do them without stopping and all at the same time. Last week, I did 75% of all 3 events inthe same day and I was tired that night! Let's hope my training will continue to improve my 'abilities' over the next 15 weeks...