The Influence of a High Carbohydrate Intake during Recovery from Prolonged, Constant-Pace Running

in International Journal of Sport Nutrition and Exercise Metabolism
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The present study examined the influence of ingesting 3.0 g CHO · kg1 body mass ⋅ 2 hr1 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% VO2max (Rt) followed by 4 hr recovery (REC) and a further exhaustive run at 70% VO2max (R2). During REC, subjects ingested either two feedings of a 6.9% glucose-polymer (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 ⋅ Kg1 body mass 2 hr1 does not improve endurance capacity 1 hr later.

J.L. Fallowfield is with the Centre for Sports Sciences, Chichester Institute of Higher Education, College Lane, Chichester, PO19 4PE, UK. C. Williams is with the Department of Physical Education, Sports Science and Recreation Management, Loughborough University, Loughborough, LE11 3TU, UK.

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