The metabolic response to prolonged walking in fed and fasted XXXX .

@entity1 @entity844 @entity4322 @entity653 @entity3813 @entity880 @entity493 @entity413
Six healthy @entity1 walked 37 km (23 miles) per day over a 3- @entity3813 course for each of 4 consecutive days. Subjects were allowed breakfast and an unrestricted diet was consumed after completion of the walk, but no food was consumed during or between laps. At a later date the same subjects walked over the same course after an overnight fast and without breakfast. Completion time for each @entity3813 was 139 +/- 1 min (mean +/- SE) and exercise intensity was equivalent to 17 +/- 1% VO2max. Mean 24h energy intake was 14.5 +/- 0.8 MJ during the fed walk. Estimated daily energy expenditure was 12.0 MJ. Blood @entity413 concentration fell significantly on the first, third and fourth days of the fed walk, but no subject became hypoglycaemic. @entity413 concentration did not fall during the fasted walk and was significantly higher pre-exercise and at the end of laps one and three when compared to the first day of the fed walk. Blood @entity493 concentration fell significantly after the end of the first @entity3813 of each day of the fed walk but not during the fasted walk. Blood @entity880 levels did not change during the course of either walk. Plasma free @entity844 , @entity653 and blood @entity4322 concentrations were unchanged during the passage of the first @entity3813 on each day of the fed walk, but all three had increased significantly by the end of the first @entity3813 of the fasted walk.(ABSTRACT TRUNCATED AT 250 WORDS)
