These knots are good, but in very cold, winter conditions they can create problems.
Blood circulation to the lower foot and toes can be partially restricted. This can lead to frostbite. Local SAR personnel and ER staff have seen the unfortunate results.
In photographs of frostbitten feet (not pretty) there is often observed a very distinct line on the feet, prior to rewarming, below which the feet are very white, but above healthy. This line corresponds to the place on the boot where the laces were too tight.
A balance needs to be struck between foot comfort and circulation when hiking or climbing in very cold conditions.
The book Medicine for Mountaineering has a good explanation.
Last edited by Bob West; 10/18/13 11:15 AM.
