Posted: 16/03/2005 at 12:11
It all depends on your priorities. If you want to be a runner who does Triathlons then you'll need to keep up the running. If a big Triathlon is going to be a main focus though the general rule of thumb is to train most at your weakest of the three. Also, depending on how 'long' you want to race depends on how much cycling you need to do. Generally Tri's are around 15%swim, 50%bike and 35%run so this is a good way to split the training.
Don't tell anyone on the Ultra forum I said this ;) but tritalk.co.uk is full of improving triathletes who are full of good advice (plus some that have too much money and like to spend it on expensive bikes).
Another thing you'll need to practice though is bike/run bricks. As you've done a few Sprint races I presume you've had the wonderful jelly legged feeling you get when you try to run straight off the bike. A bit of practice will help to erase that feeling.
Enjoy, I look forwards to seeing you on the Tri circuit :)