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

FLUID REPLACEMENT FOLLOWING DEHYDRATION REDUCES OXIDATIVE STRESS DURING RECOVERY.

To investigate the effects of hydration status on oxidative DNA damage and exercise performance, 10 subjects ran on a treadmill until exhaustion at 80% VO(2max) during four different trials [control (C), 3% dehydration (D), 3% dehydration+water (W) or 3% dehydration+sports drink (S)]. Dehydration significantly decreased exercise time to exhaustion (D

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

THE INFLUENCE OF NUTRITIONAL ERGOGENIC AIDS ON EXERCISE HEAT TOLERANCE AND HYDRATION STATUS.

Exercise in the heat may predispose an athlete to an exertional heat illness. It is imperative to be knowledgeable on the influence of various nutritional supplements on exercise tolerance and hydration status. Because of the variety of nutritional ergogenic aids that are easily accessible to athletes, medical and health professionals must rely on empirical evidence [...]

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

HYPOHYDRATION AND EXERCISE: EFFECTS OF HEAT ACCLIMATION, GENDER, AND ENVIRONMENT

This study examined the effects of heat acclimation and subject gender on treadmill exercise in comfortable (20 degrees C, 40% rh), hot-dry (49 degrees C, 20% rh), and hot-wet (35 degrees C, 79% rh) environments while subjects were hypo- or euhydrated. Six male and six female subjects, matched for maximal aerobic power and percent body [...]

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

COMPARISON OF FLUID BALANCE BETWEEN COMPETITIVE SWIMMERS AND LESS ACTIVE ADOLESCENTS.

The aim of this study was to compare daily hydration profiles of competitive adolescent swimmers and less active maturation- and sex-matched controls. Hydration profiles of 35 competitive adolescent swimmers (male n = 18, female n = 17) and 41 controls (male n = 29, female n = 12) were monitored on 4 consecutive days. First [...]

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

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

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

THE IMPACT OF PHYSICAL EXERCISE ON THE GASTROINTESTINAL TRACT.

PURPOSE OF REVIEW: Physical exercise can be both beneficial and harmful for the gastrointestinal tract in a dose-effect relationship between its intensity and health. Mild-to-moderate intensity exercises play a protective role against colon cancer, diverticular disease, cholelithiasis and constipation, whereas acute strenuous exercise may provoke heartburn, nausea, vomiting, abdominal pain, diarrhea and even gastrointestinal bleeding. [...]

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