The main purpose of this investigation was to analyze the effect of a ten minute low to moderate physical exercise on skin temperature over the knee during the activity period and in the recovery period. Physical activity influences the fall in skin temperature over the working joints during first several minutes of the stationary bicycle exercise, in controlled environment, after which a continuous rise in skin temperature occurs. During the recovery period, after the activity, rise in skin temperature continues above pre-exercise values. It has been established that ten minute recovery period was not sufficient for the stabilization of skin temperature.

The main purpose of this investigation was to analyze the effect of interval type of physical exercise on skin temperature changes of the knees. Subject were instructed to ride a stationary bicycle with 90 second periods of work and 30 second periods of rest, in a low to moderate physical strain. Statistically significant differences were found between mean activity and recovery skin temperatures, and mean rest and recovery skin temperatures. Interval fall in skin temperature can be seen during short periods of work, which is followed by a rise in skin temperature when subjects are given short time to rest.