Hi Shawn. I’m a huge proponent of higher intensity, interval type training. However, with that being said, there is still a place for slow, distance type training. When I’m working with a de-conditioned client, someone who is overweight, or a beginner, I will often begin the aerobic component of their exercise program with slower distance type training. Keeping in mind that in our industry the concept of “relativity” is EXTREMELY important, “distance” training is relative to your specific client. So for example, simply walking 3-blocks may be “distance training” for an obese client. The key is to progressively overload the client in a safe and effective way, so if my client comes to me in such a shape that a slow walk presents a “challenge” for them, then I see them as definitely a candidate for a slow, distance training regimen to get them started in the right direction.
I hope this helps you.