Light-intensity PA was found to be beneficially associated with obesity , markers of lipid and glucose metabolism , and mortality .
Conclusions Observational evidence that light-intensity PA can confer health benefits is accumulating .
Background The health effects of light-intensity physical activity ( PA ) are not well known today .
Objective We conducted a systematic review to assess the association of accelerometer-measured light-intensity PA with modifiable health outcomes in adults and older adults .
Effects of pre-exercise ingestion of carbohydrate on glycaemic and insulinaemic responses during subsequent exercise at differing intensities
Abstract . The development of rebound hypoglycaemia has been reported after pre-exercise carbohydrate ( CHO ) ingestion in some studies but not in others . Differences in the experimental design and factors such as the exercise intensity are likely to be responsible for the discrepancies between these studies . Exercise intensity might be a crucial factor since it affects both insulinaemia and glucose uptake . Therefore the aim of the present study was to compare the glycaemic and insulinaemic responses to exercise at different intensities after ingestion of a st and ardized pre-exercise CHO load .  Eight moderately trained subjects consumed 75 g of glucose 45 min prior to 20 min of exercise at 40 % , 65 % or 80 % maximal power output . Blood sample s were collected before glucose ingestion , at 15 min intervals at rest and 5 min intervals during exercise . During exercise , measurements of heart rate and breath-by-breath analysis of expired gas were performed continuously . The trials were performed at [ mean ( SEM ) ] 55 ( 1 ) , 77 ( 1 ) and 90 ( 1 ) percentages maximal oxygen uptake . At the onset of exercise , plasma glucose concentration returned to pre-ingestion levels , while the insulin concentration was more than three times higher than at rest [ on average 57 ( 7 ) compared to 16 ( 1 ) μU·ml–1 ) . During exercise , plasma glucose concentrations decreased during the first 5 min of exercise and then stabilized in all trials at concentrations that would not be considered to be hypoglycaemic . There were no significant differences in glucose or insulin concentrations between the three trials during exercise . These data suggest that the glycaemic response to ingestion of 75 g of CHO 45 min pre-exercise is similar during exercise of different intensities
Light-intensity PA was found to be beneficially associated with obesity , markers of lipid and glucose metabolism , and mortality .
Conclusions Observational evidence that light-intensity PA can confer health benefits is accumulating .
Background The health effects of light-intensity physical activity ( PA ) are not well known today .
Objective We conducted a systematic review to assess the association of accelerometer-measured light-intensity PA with modifiable health outcomes in adults and older adults .