Years before I heard of Shinzen Young, I had always “enjoyed” practicing meditation in the cold. Some part of it probably goes back to childhood, when I had to wait for the schoolbus in the freezing cold of northern Illinois winters. (This was in the time before global warming.) I used to stand there without moving, and mentally I’d concentrate on not being cold, or at least not feeling the cold.
Many years later when I lived in Alaska, I used to enjoy going up into the mountains to basically inflict the same thing on myself. I always thought the “meditate deeply or suffer the consequences” approach forced me to meditate more deeply. This past winter that same “Do or die, there is not try” mentality forced me to maintain my focus and helped to combat my medically-induced lack of energy.