Effect of sodium and calcium ingestion on thermoregulation during exercise in manThe effects of hypertonic sodium and calcium ingestion on body temperature during exercise in cool and hot environments are investigated. Rectal and mean skin temperatures, sweat rates and arm and leg total blood flows were measured in men during periods of rest, submaximal exercise and recovery at temperatures of 26.5 C and 39.4 C after ingestion of NaCl and CaCl2 solutions. In both environments, higher rectal temperatures are observed after hypertonic sodium ingestion, which is also associated with attenuated blood flow in the extremities, lower sweat rates and slightly higher skin temperature in the heat, indicating significant thermoregulatory responses. Hypertonic calcium and isotonic sodium cause no temperature change, although calcium caused a reduction of blood flow in the extremities.
Document ID
19790046611
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Greenleaf, J. E. (NASA Ames Research Center Moffett Field, CA, United States)
Brock, P. J. (NASA Ames Research Center Moffett Field, CA, United States)
Morse, J. T. (NASA Ames Research Center Moffett Field, CA, United States)
Van Beaumont, W. (NASA Ames Research Center Moffett Field, CA, United States)
Montgomery, L. D. (NASA Ames Research Center Moffett Field, CA, United States)
Convertino, V. A. (NASA Ames Research Center Moffett Field, CA, United States)
Mangseth, G. R. (NASA Ames Research Center Moffett Field, Calif., United States)