There is not a rule or regulation for this but it may just be general etiquette not to. Although your opponent may not mind then it is fine, no penalty would be given either way.
Walking Against the Wind - 2013 I was released on: USA: 2 January 2013
Walking across the room is not work against gravity.Walking up the stairs is work against gravity.Walking down the stairs is work with gravity.
The act of walking away from a teacher is not against the law. Other circumstances may complicate the situation.
The only forms of normal walking are forward and backward. Walking backwards can sometimes be useful because it evens out the stress on your body. For that reason, for example, it's a good idea to walk the last one or two hundred yards of your walk backwards. Walking may also be categorized by pace. "Brisk" walking is walking at a pace of 4 mph (or more). Race walking, as in the Olympic games, is not normal walking; it looks odd compared to normal walking and it's done at a very brisk pace in competition.
Shuffling is the act of walking in such a manner that your feet drag/slide against the ground/floor as you walk. If it's happening against one's will it could be the result of a muscular, neurological, and/or inherited disorder.
the people were walking to protest against the unemployment
No-one knows cause no-one knows what you're talking about
Crossing a street against a light, or crossing at a place that is not designated a crosswalk.
Against the flow of traffic.
You push against the floor; the floor pushes against you - in the opposite direction.
It meant that "Whoever is not teaching against what Messiah was teaching, is for us, even if they were not walking with them". It was in reference to others teaching in the name of Yeshua (jesus) and teaching his teachings, but were not physically walking with Yeshua and his group.
The answer is inertia