One interesting method that many of the old physical culture practitioners recommended was plenty of cold weather tempering. Not only was this a way to strengthen the power of the mind, it allowed for an individual to become “one” with nature, instead of existing in opposition to it. This practice had some rather interesting effects on overall health.
One such individual was P. Ivanov (shown above) who eventually became so at ease in the harsh Russian winter that he could spend any amount of time in the out of doors barefoot and wearing nothing but a pair of shorts! This concept deserves greater study.