EFFECTS OF GLYCEROL-INDUCED HYPERHYDRATION PRIOR TO EXERCISE IN THE HEAT ON SWEATING AND CORE TEMPERATURE

Hypohydration reduces exercise performance and thermoregulatory capacity in the heat. Hyperhydration prior to exercise may decrease, delay, or eliminate the detrimental effects of hypohydration. The rapid clearance of excess fluid makes hyperhydration of subjects with common beverages difficult. Glycerol, a natural metabolite which is rapidly absorbed, has osmotic action, and is evenly distributed within the [...]

By |2013-01-31T18:34:06+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

FLUID AND ELECTROLYTE BALANCE: EFFECTS ON THERMOREGULATION AND EXERCISE IN THE HEAT

During exercise, sweat output often exceeds water intake, producing a water deficit or hypohydration. The water deficit lowers both intracellular and extracellular fluid volumes, and causes a hypotonic-hypovolemia of the blood. Aerobic exercise tasks are likely to be adversely effected by hypohydration (even in the absence of heat strain), with the potential affect being greater [...]

By |2013-01-31T18:34:05+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

EFFECTS OF DEHYDRATION ON GASTRIC EMPTYING AND GASTROINTESTINAL DISTRESS WHILE RUNNING

Gastrointestinal distress is commonly reported by athletes after ingestion of a beverage. We speculate that ingestion may be occurring after dehydration has taken place. The high prevalence of GI disorders in marathon runners who have lost greater than or equal to 4% body weight supports this theory. To test this theory, the effects of dehydration, [...]

By |2013-01-31T18:34:05+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

PHYSIOLOGICAL CONSEQUENCES OF HYPOHYDRATION: EXERCISE PERFORMANCE AND THERMOREGULATION

During exercise in the heat, sweat output often exceeds water intake, which results in a body water deficit or hypohydration. This water deficit occurs from both the intracellular and extracellular fluid compartments, and causes a hypertonic-hypovolemia of the blood. Aerobic exercise tasks are likely to be adversely affected by hypohydration; and the warmer the environment [...]

By |2013-01-31T18:34:05+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

THERMOREGULATION IN HYPERHYDRATED MEN DURING PHYSICAL EXERCISE

The influence of hyperhydration on thermoregulatory function was tested in 8 male volunteers. The subjects performed cycle exercise in the upright position at 52% Vo2max for 45 min in a thermoneutral (Ta = 23 degrees C) environment. The day after the control exercise the subjects were hyperhydrated with tap water (35 ml X kg-1 of [...]

By |2013-01-31T18:34:05+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments