I've been leafing through Schuler's 'New Rules of Lifting', and one thing he mentioned in it caught my attention (for those that have it, it's on pages 83-85).
He talked about the adverse effects of doing both strength oriented exercises and endurance oriented exercises in equal proportions (ex: each three times a week, separately) and how you would still get increases in strength and endurance (obviously not as much of each if you were just focusing on one), but your body would choose endurance over muscle growth.
His solution for this was to do them at the same time (ie hour of lifting, then an hour of running/swimming/cycling).
I don't quite understand the logic behind it though, and he didn't go particularly in depth in the book. Can anyone expand on why this would work?
Assuming that this is true, I'm wondering if I could add swimming to my training days (before/after - would it make a difference?). I used to swim competitively and stopped due to injuries, but still miss it and would like to add it back in... but without compromising what I'm trying to accomplish in the gym (strength and some size).