Accession Number:

AD0655069

Title:

THE COMBINED EFFECTS OF COLD AND EXERCISE ON THE TRICEPS SURAE REFLEX,

Descriptive Note:

Corporate Author:

ARCTIC AEROMEDICAL LAB FORT WAINWRIGHT ALASKA

Personal Author(s):

Report Date:

1967-05-01

Pagination or Media Count:

20.0

Abstract:

The one-half relaxation time 12 RT for the triceps surae reflex was studied in four subjects after five-minute runs at 134 mmin 5 mihr on a treadmill set at 10 grade. This exercise decreased 12 RT to 90 of normal. Cooling by immersion to the neck for 60 min in a stirred 30C bath enhanced the exercise effect on 12 RT decreased it to 87 whereas cooling alone lengthens the relaxation phase. Eight highly-fit athletes U. S. Biathlon Team who exercised at the higher level of 5 min at 188 mmin 7 mihr and 8.6 grade, showed a greater effect on 12 RT a decrease to 83 of the pre-exercise value. The shortening of relaxation time by exercise appears to be a warm-up phenomenon related to local metabolic changes in muscle which, paradoxically, are enhanced by whole-body cooling. Author

Subject Categories:

  • Personnel Management and Labor Relations
  • Anatomy and Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE