There are 3 kinds of wisdom: discernment, skillful means and realization. Walking meditation and appropriate mindfulness are skillful means for cultivation. Together they bring around a stewarding akin to that of the sheepdog that moves within the flock, not outside it. This results in the deep harmony of samādhi.
Our walking gets programmed by the drives of the mind. Whatever affects the mind affects the nervous system of the body – the body shows us the effects of our thinking. Walking meditation can return us to the natural quality of the body, so the mind can relax.
Our schedule alternates walking and sitting meditation practices periods which take up many hours. But there are still many other times in the day to practice mindfulness in activities.
The schedule on retreat emphasizes walking and sitting meditation. But we also practice all the other parts of the 8 fold path. The talk describes how.