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Key Points
- Repeated sprint activity, characteristic of football, results in a net reduction in muscle glycogen concentrations, which has been associated with impaired performance toward the latter stages of a match.
- The daily intake of carbohydrate should be proportionate to estimated fuel cost of the training session or match.
- The ingestion of 2.5 g of carbohydrate/kg BM in the “pre-match meal” three hours prior to exercise will “top up” stores of glycogen in the muscle and liver.
- The ingestion of 60 g of carbohydrate/h, prior to and during exercise (including halftime) will preserve endogenous glycogen and increase blood glucose concentrations. As a result, players are able to maintain high intensity running throughout the match, identified as key performance attributes of top level football players and teams.
- Muscle damage as a consequence of frequent changes in direction, decelerations from sprints and contact between players during match play can impair glycogen synthesis after exercise.
- Evidence is accumulating that carbohydrate ingestion also has a beneficial impact on skill performance, however future studies are required to determine the exact mechanisms involved.
https://secure.footprint.net/gatorade/stg/gssiweb/pdf/SSE127_Rollo.pdf
