Effects of physical training on several glycolytic enzymes in rat heart.
In response to a program of daily swimming for 16 weeks, the activities of pyruvate kinase and lactate dehydrogenase increased significantly in the hearts of young male rats. The isozyme composition  in M of cardial lactate dehydrogenase increased from 28.5 to 32.7% in the trained animals. Phosphofructokinase activity and glycogen content were unchanged. The hearts of the exercising animals were 28% heavier than those of sedentary paired weight controls.
D000818:Animals; D005215:Fasting; D006003:Glycogen / Q000378:metabolism; D006019:Glycolysis; D007527:Isoenzymes; D007770:L-Lactate Dehydrogenase / Q000378:metabolism*; D008297:Male; D009206:Myocardium / Q000201:enzymology*; D010732:Phosphofructokinase-1 / Q000378:metabolism; D005082:Physical Exertion; D011770:Pyruvate Kinase / Q000378:metabolism; D051381:Rats; D013550:Swimming
D007527:Isoenzymes; D006003:Glycogen; D007770:L-Lactate Dehydrogenase; D010732:Phosphofructokinase-1; D011770:Pyruvate Kinase