Dietary effects on liver and muscle glycogen repletion in exhaustively exercised rats: Energy composition and type of complex carbohydrates.

Abstract

SummaryPrevious reports have indicated that administration of a glucose-citrate (G-C) drink after a bout of exhaustive exercise results in more effective glycogen repletion in liver and skeletal muscle in rats as compared with administration of glucose alone. The present studies report the effects of the energy pattern and the type of carbohydrates, dextrin or starch from rice, in diet given following the G-C drink after exercise, on further glycogen repletion in the tissues of rats. Rats were adapted to meal-feeding 3 times a day and trained with light swimming for 7 to 10 days. On the final day of experiments, rats received the G-C drink after 2h of exhaustive swimming and were then fed on diets with different energy patterns or carbohydrate types. Results showed that a high-carbohydrate diet is more effective than a high-fat diet for further glycogen repletion in liver and skeletal muscle. In addition, dextrin was revealed to be superior to starch as a carbohydrate source in tissue glycogen repletion. As compared with the high-fat diet, the high-carbohydrate diet, however, resulted in a lower serum free fatty acid concentration 4h after ingestion of food possibly by decreasing adipose tissue lipolysis.

Nutritional design for repletion of liver and muscle glycogen during endurance exercise without inhibiting lipolysis.

“…Our recent investigations (3,4) have been conducted to study the nutritional composition of drink or meal which can lead to a rapid repletion of liver and skeletal muscle glycogen stores following exercise in rats.…”

UCP1 deficiency increases susceptibility to diet‐induced obesity with age

“…Lipolytic activity of adipose tissues was measured as described (Suzuki et al, 1984). Pieces of adipose tissue were incubated…”

Glycemic Carbohydrates Consumed with Amino Acids or Protein Right after Exercise Enhance Muscle Formation

“…In addition, the recovery of skeletal muscle glycogen after exercise was signi cantly greater when a high-glycemic carbohydrate (i.e., dextrin) was fed than when a lower-glycemic carbohydrate (i.e., starch) was fed in rats. 40 Some caution is needed in view of the recent trend to emphasize low-glycemic and low-insulinogenic carbohydrates for health in an effort to prevent and treat obesity, diabetes mellitus, and hyperlipidemia.…”