PMC:2675008 / 26951-28036 JSONTXT

{"project":"2_test","denotations":[{"id":"19175600-11120525-7908408","span":{"begin":197,"end":198},"obj":"11120525"},{"id":"19175600-16542657-7908409","span":{"begin":199,"end":200},"obj":"16542657"},{"id":"19175600-11120525-7908410","span":{"begin":352,"end":353},"obj":"11120525"},{"id":"19175600-16542657-7908411","span":{"begin":354,"end":355},"obj":"16542657"},{"id":"19175600-17454546-7908412","span":{"begin":356,"end":358},"obj":"17454546"},{"id":"19175600-17454546-7908413","span":{"begin":556,"end":558},"obj":"17454546"},{"id":"19175600-16799109-7908414","span":{"begin":1080,"end":1082},"obj":"16799109"},{"id":"19175600-15829535-7908415","span":{"begin":1083,"end":1085},"obj":"15829535"}],"text":"Two studies indicate that women receiving 250 ml per hour of Ringer's lactated solution intravenously had shorter duration of labour and less need for oxytocin than those receiving 125 ml per hour.7,8 The assumption regarding beneficial influence of larger volumes of fluids during labour is largely based on literature in the field of sports medicine.7,8,27 For optimal muscle performance, athletes are recommended to drink ‘the maximal amount tolerated’ as the sensation of thirst is believed to underestimate the real fluid requirements during exercise.27 Thirst is, however, a strong physiologic stimulus, effectively protecting against dehydration when fluids are readily available. No physiologic warning system protects the body against over-hydration. Therefore, suppression of thirst by abundant drinking implies exposure to the risk of hyponatraemia. Since 1991, several deaths due to hyponatraemic encephalopathy have occurred during endurance competitions. Common recognition of excessive drinking as the main cause of these disasters was, however, delayed until 1995.28,29"}