TY - JOUR
T1 - Cardiovascular response to acute aquatic and treadmill exercise in the untrained rat
AU - Flaim, S. F.
AU - Minteer, W. J.
AU - Clark, D. P.
AU - Zelis, R.
PY - 1979/1/1
Y1 - 1979/1/1
N2 - The cardiovascular effects of acute aquatic (AE) and treadmill (TE) exercise were determined in untrained adult male Sprague-Dawley rats. Animals were exercised to exhaustion or for a maximum of 5 min with either exercise mode and data collected during the last minute of exercise were compared to preexercise rest data. Heart rate and cardiac output increased only with TE; arterial pressure remained stable during both protocols. Regional blood flow was determined by the radioactive microsphere technique. Coronary flow increased only with TE. Skeletal muscle flow, determined in six muscle groups, increased more with TE (97% to 587%) than with AE (-44 to 260%) (flow in the quadriceps group decreased during AE). Flow to the skin and splanchnic regions decreased; cerebral flow increased in both groups. Blood gas data suggest lactic acidosis and hyperventilation only with TE. These data indicate that the cardiovascular effects of acute, exhaustive bouts of AE and TE in the rat are not comparable, and the hemodynamic changes occurring with exhaustive TE in rat, as in man, involve a shunting of blood to the regions of demand and away from the nonessential circulations.
AB - The cardiovascular effects of acute aquatic (AE) and treadmill (TE) exercise were determined in untrained adult male Sprague-Dawley rats. Animals were exercised to exhaustion or for a maximum of 5 min with either exercise mode and data collected during the last minute of exercise were compared to preexercise rest data. Heart rate and cardiac output increased only with TE; arterial pressure remained stable during both protocols. Regional blood flow was determined by the radioactive microsphere technique. Coronary flow increased only with TE. Skeletal muscle flow, determined in six muscle groups, increased more with TE (97% to 587%) than with AE (-44 to 260%) (flow in the quadriceps group decreased during AE). Flow to the skin and splanchnic regions decreased; cerebral flow increased in both groups. Blood gas data suggest lactic acidosis and hyperventilation only with TE. These data indicate that the cardiovascular effects of acute, exhaustive bouts of AE and TE in the rat are not comparable, and the hemodynamic changes occurring with exhaustive TE in rat, as in man, involve a shunting of blood to the regions of demand and away from the nonessential circulations.
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U2 - 10.1152/jappl.1979.46.2.302
DO - 10.1152/jappl.1979.46.2.302
M3 - Article
C2 - 422445
AN - SCOPUS:0018398766
SN - 0161-7567
VL - 46
SP - 302
EP - 308
JO - Journal of Applied Physiology Respiratory Environmental and Exercise Physiology
JF - Journal of Applied Physiology Respiratory Environmental and Exercise Physiology
IS - 2
ER -