The influence of a high carbohydrate intake during recovery from prolonged, constant-pace running.
The present study examined the influence of ingesting 3.0 g CHO . kg-1 body mass . 2 hr-1 after prolonged exercise on recovery and running capacity 4 hr later. Nine men and 8 women completed two trials in a counterbalanced design. Each trial consisted of a 90-min run on a level treadmill at 70% VO2 max (R1) followed by 4 hr recovery (REC) and a further exhaustive run at 70% VO2 max (R2). During REC, subjects ingested either two feedings of a 6.9% glucosepolymer (GP) solution (D trial) or two feedings of a 19.3% GP solution (C trial). There were no differences in mean (+/- SE) R2 run times between the C and D trials or between the male and female subjects. More stable blood glucose concentrations were maintained during REC in the C trial, such that blood glucose was elevated in the C trial in comparison with the D trial after 210 min of REC. It was concluded that increasing postexercise carbohydrate intake from 1.0 to 3.0 g CHO . kg-1 body mass . 2 hr-1 does not improve endurance capacity 1 hr later.
Fallowfield
J L
JL
Centre for Sports Sciences, Chichester Institute of Higher Education, UK.
Williams
C
C
D000328:Adult; D000641:Ammonia / Q000097:blood; D001786:Blood Glucose / Q000032:analysis; D002241:Carbohydrates / Q000494:pharmacology*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D005990:Glycerol / Q000097:blood; D006801:Humans; D007328:Insulin / Q000097:blood; D007773:Lactates / Q000097:blood; D008297:Male; D010807:Physical Endurance / Q000187:drug effects*; D012420:Running; D016037:Single-Blind Method
D001786:Blood Glucose; D002241:Carbohydrates; D005230:Fatty Acids, Nonesterified; D007328:Insulin; D007773:Lactates; D000641:Ammonia; D005990:Glycerol