This meditation is from Preparing the Heart: Meditations for Jewish Spiritual Practice. Rabbi Sheila Weinberg describes walking practice as a way of paying attention to the sensations in the body, gathering our attention and focus in the body.

Walking practice is based in bringing awareness to each step as it manifests in sensation through the entire body.  Walking is its own practice when it is, itself, an  opportunity to gather our attention into this present moment, in the felt experience of the body so that we have a place to rest, a platform in which to see distraction and settle down.  As with other meditative practices, it provides us with a focus to aim the attention when the mind wanders, it allows us to focus back on the direct sensations of walking as they are experienced in the body, reconnecting to intention, and sustaining our attention.  (11:46)