INFLUENCE OF HYDRATION LEVEL AND BODY FLUIDS ON EXERCISE PERFORMANCE IN THE HEAT

During exercise in the heat, sweat output often exceeds water intake, resulting in hypohydration, which is defined as a body fluid deficit. This fluid deficit is comprised of water loss from both the intracellular and extracellular fluid compartments. Hypohydration during exercise causes a greater heat storage and reduces endurance in comparison with euhydration levels. The [...]

By |2013-01-31T18:34:19+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

CONTROL OF THERMOREGULATORY SWEATING DURING EXERCISE IN THE HEAT

The purposes of this study were the following: 1) to determine whether erythrocyte infusion alters the control of thermoregulatory sweating and 2) to demonstrate how increases and decreases of both plasma tonicity and blood volume influence the thermoregulatory control parameters of threshold temperature and sweating sensitivity. Six non-heat-acclimated and five heat-acclimated males attempted heat stress [...]

By |2013-01-31T18:34:19+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

IMPAIRED HIGH-INTENSITY CYCLING PERFORMANCE TIME AT LOW LEVELS OF DEHYDRATION

On two separate occasions six trained subjects (peak oxygen consumption [VO2peak] 4.41/min) rode for 60 min at 70% of VO2peak and then to exhaustion at 90% of VO2peak to determine the effects of mild dehydration on high-intensity cycling performance time in the heat (32 degrees C, 60% relative humidity, wind speed 3 km/h). In one [...]

By |2013-01-31T18:34:19+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

FLUID BALANCE AND HYDRATION HABITS OF ELITE FEMALE FIELD HOCKEY PLAYERS DURING CONSECUTIVE INTERNATIONAL MATCHES.

The purpose of this study was to assess sweat loss and hydration practices of elite female field hockey players during consecutive international matches. Eighteen England U21 field hockey players were assessed during 2 consecutive international matches. Sweat loss was assessed from changes in body mass after correction for the volume of fluid consumed and any [...]

By |2013-01-31T18:34:19+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

VOLUNTARY DEHYDRATION AND COGNITIVE PERFORMANCE IN TRAINED COLLEGE ATHLETES.

Cognitive and mood decrements resulting from mild dehydration and glucose consumption were studied. Men and women (total N = 54; M age = 19.8 yr., SD = 1.2) were recruited from college athletic teams. Euhydration or dehydration was achieved by athletes completing team practices with or without water replacement. Dehydration was associated with higher thirst [...]

By |2013-01-31T18:34:18+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments

PHYSIOLOGICAL AND PERFORMANCE EFFECTS OF GLYCEROL HYPERHYDRATION AND REHYDRATION.

Studies have shown that beverages containing glycerol can enhance and maintain hydration status and may improve endurance exercise performance by attenuating adverse physiological changes associated with dehydration. Improvements to performance include increased endurance time to exhaustion by up to 24%, or a 5% increase in power or work. However, some studies have found no performance [...]

By |2013-01-31T18:34:18+00:00enero 31st, 2013|Exercise and sport, Scientific papers|0 Comments