PubMed · 4748325
The source did not provide an abstract. Follow the original record for more information.
Explore connections, maps & timelines
N Taylor. 1973. Letter: Exercise.. https://pubmed.ncbi.nlm.nih.gov/4748325/
Cite the original work for its findings. Save a collection to share your selection of sources.
KEEP EXPLORING
These findings suggest that PA banding may be suitable in children with congenital heart disease and excessive pulmonary flow, and that best results are obtained when the band circumference is < 90% of the standard pulmonary valve-ring circumference, as calculated from an equation derived from normal pulmonary valve dimensions. This guideline applies equally well to small infants weighing < 3 kg and to larger patients.
Differences in physical activity represent the largest source of variability in energy requirements, both within and between individuals. Chronic changes in physical activity can produce chronic changes in energy requirements that, if not compensated for, can lead to changes in the level at which body weight and body composition are maintained over time. We present a model that can serve as a framework for understanding how energy and macronutrient balance are maintained in steady state conditions, and for illustrating the potential effect of a change in physical activity on these steady state conditions and on energy requirements. According to the model, a chronic change in physical activity forces changes in other aspects of energy and substrate utilization so that a steady state condition can be reestablished. The net effects of the change in physical activity on energy requirements will depend on how and over what period of time these new steady states are reached. Although we cannot at present predict, for any individual, the precise effect of changes in physical activity on energy requirements and on body weight and composition, our model provides a framework for further study of the factors that can influence energy requirements.
High-fat foods are readily overeaten. This could be because fat increases the palatability and energy density of foods or because fat has a low satiety value compared with carbohydrate. In several studies examining the effects of preloads that varied in fat and carbohydrate content on subsequent food intake, there was little difference in the effects of fat and carbohydrate on satiety. A dose-response preloading paradigm gives the most sensitive index of satiety. In one such test it was found that the effects of yogurts varying in fat or carbohydrate content did not differ in normal-weight, unrestrained men. However, in obese individuals or those concerned with body weight, fat in the yogurts was less effective in reducing subsequent food intake than carbohydrate. More studies are required to determine whether this small, but significant, insensitivity to energy from fat affects the regulation of food intake and body weight.