Training Plans --> Using your training plans --> Weight Training and Core Strength Information link. It's halfway down on that page. I think that's the one you're referring to.
A few years ago, I was diagnosed with two lumbar herniated discs (L1-L2). I have started a very slow build towards my first tri. Are there any recommendations or warnings I should heed?
It sounds like you have a very common condition that many runners and triathletes experience called patello-femoral pain syndrome. We have seen that runners with core weakness experience this.
The goal of this program is simple – for the cyclist to have IMPROVED performance when the next season rolls around, not merely to maintain last season’s fitness.
Top swimmers rotate the core of the body from one side to the other while keeping the head fixed. When you rotate in this way, you move through the water more like a fish, maximizing your efficiency.
A strong core will allow you to keep optimal body alignment for whatever you’re doing (swim, bike or run), and this in turn will reduce your fatigue in the long run.