As a runner, especially one following this program, you will not be following a lifting schedule that prioritizes hypertrophy. And you certainly won’t avoid all catabolic exercises because running falls squarely into this category!
While you may occasionally have a calorie surplus, you won’t have the other two main ingredients for gaining muscle.
Instead, this lifting program prioritizes strength and power - the ability to produce high forces quickly. And you’ll be running in addition to lifting, which makes muscle gain extremely difficult.
With that said, let’s consider a related but fundamentally different issue: body composition (the percentage of your total weight that’s made up of muscle, fat, bone, etc.).
If you’ve never lifted weights before, a strength training program such as this one may result in 1-3 extra pounds.
But all weight is not the same. IF you gain weight (most people won't) you’ll likely gain a small amount of muscle while losing a small amount of fat.
The result is often a small increase in total bodyweight because muscle is denser than fat and the same volume of it weighs more.
But this trade-off (more muscle and less fat) is beneficial. You’ll be a healthier, stronger runner even if you end up weighing a few pounds more than you did previously.
So no, you won’t “bulk up.” But you will improve your body composition and most importantly, increase the strength, power, and resiliency of your muscles.
If you’re ready to leave the junk-science at home and train like an elite, you’re in the right place.