Carbohydrate and Fluid Needs of the Soccer Player

摘要: Soccer is a game that demands combination of repeated maximal sprinting with 10 to 11km moderate running, sometimes performed under extremely warm conditions. Over the course match, there partial near complete depletion glycogen reserves in leg muscles (depending on extent initial and level competition), resultant decrease physical performance. Blood glucose levels also fall, values likely cause deterioration both tactical thinking cooperation between players (3.0 3.8 mmol/L), while tropical climates, fluid losses can amount 4 5 kg body weight. The effectiveness solutions correcting these problems limited for 2 main reasons: concentrations greater than 2.5% slow rate gastric emptying thus absorption, provoking secretion insulin hypoglycaemia. Fructose are less liable increase secretion, but they have an equal propensity slowing emptying; moreover, ingested fructose largely metabolised liver, without boosting blood glucose. However, polymer preparations low osmotic pressure per unit content equivalent, so substantial amounts carbohydrate be administered this fashion before inhibited. If polymers given during soccer game, sustain glucose, sparing muscle stores increasing concentration too high, one possible complication movement water from plasma into gut; nevertheless, appropriate choice (for example, 7% polycose, 360 mOsm/L, volume increased rather decreased relative seen administration water. Probably because intergame interval competitive short, replenishment proceeds quite slowly. Moreover, process does not seem helped by ingestion either or high diet.