Training effects on maternal and fetal glucose uptake following acute exercise in the rat.
The purpose of the present study was to determine the effects of chronic maternal exercise on glucose uptake in maternal tissues after one bout of treadmill running during late gestation in the rat and to determine the effects on glucose accumulation in the fetus and placenta. Trained pregnant animals (PR) ran at 30 m.min-1, on a 10 degrees incline for 1 h on day 20 of gestation with a similarly treated trained nonpregnant group (NPR). Immediately after the run the animals were infused with a bolus of 1 g.kg-1 body wt as a 50% dextrose solution mixed with 2-deoxy-D-[1-3H] glucose through a carotid catheter. Sedentary pregnant (P) and nonpregnant animals (C) were also infused with the solution after no food and water for the same time frame. After 60 min, tissues were analyzed for radioactivity. Radioactive tracer was augmented in the red gastrocnemius and soleus of the PR group and the soleus of P rats. However, tracer accumulation in the fetus and placenta of the trained animals was not different than P animals. These results indicate that acute exercise in trained animals increased glucose uptake in maternal skeletal muscles without compromising conceptus glucose accumulation.
Mottola
M F
MF
Department of Anatomy, Faculty of Medicine, University of Western Ontario, London, Canada.
Mezzapelli
J
J
Schachter
C L
CL
McKenzie
K
K
D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D003847:Deoxyglucose; D005260:Female; D005333:Fetus / Q000378:metabolism*; D005947:Glucose / Q000493:pharmacokinetics*; D007773:Lactates / Q000097:blood; D008431:Maternal-Fetal Exchange / Q000502:physiology*; D009132:Muscles / Q000378:metabolism; D009929:Organ Size; D010805:Physical Conditioning, Animal; D005082:Physical Exertion / Q000502:physiology*; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D051381:Rats; D017207:Rats, Sprague-Dawley; D013997:Time Factors; D014316:Tritium; D015430:Weight Gain
D001786:Blood Glucose; D007773:Lactates; D014316:Tritium; D003847:Deoxyglucose; D005947:Glucose