Premanand Maharaj Ji
How should I sit for meditation, and can I meditate while walking?
Sit calmly on a clean seat to meditate
Meditation on the Name is possible when you sit calmly on a clean seat. While walking, moving about or standing, you can chant the Name, but that is not meditation.
Meditation can happen only when you sit on a clean seat, sitting calmly; then you can meditate on the Name. While walking about, Name-chanting is possible, but not meditation.