Sex-based differences in body core temperature response across repeat work bouts in the heat.

Objective: To investigate the effects of repeated work bouts in the heat on peak body core temperature and to explore sex-based differences in body core temperature responses.

Methods: Fourteen males and fifteen females performed four work bouts (two heavy and two moderate, alternating) in 32.5 °C Wet Bulb Globe Temperature (WBGT), each separated by 30-min seated rest in 28.

Heat Stress Management in the Military: Wet-Bulb Globe Temperature Offsets for Modern Body Armor Systems.

Objective: The aim of this study was to model the effect of body armor coverage on body core temperature elevation and wet-bulb globe temperature (WBGT) offset.

Background: Heat stress is a critical factor influencing the health and safety of military populations. Work duration limits can be imposed to mitigate the risk of exertional heat illness and are derived based on the environmental conditions (WBGT).

Identifying Physically Demanding Tasks Performed by the Royal Australian Navy for the Development of a Physical Employment Standard.

Objective: The aim of this study was to determine an appropriate method to characterize Royal Australian Navy intermittent intensity tasks.

Method: Sixteen personnel performed four scenarios: (1) storing: repeatedly handle a 10 to 15 kg crate; (2) firefighting: walk 45 m wearing protective equipment and fighting a fire; (3) and (4) toxic hazard response: casualty evacuation tasks wearing protective equipment. Heart rate and oxygen consumption ((Equation is included in full-text article.

The Effectiveness of Basic Military Training To Improve Functional Lifting Strength in New Recruits.

Australian Army recruits are required to meet the incumbent baseline physical employment standards (PES) during basic military training. A box lift and place (BLP) assessment is included in the PES, and it assesses the ability to perform essential muscular strength tasks. Therefore, basic military training must provide sufficient training stimulus to enable recruits to achieve the baseline BLP standard.

Health, fitness, and responses to military training of officer cadets in a Gulf Cooperation Council country.

Objective: To quantify the health, fitness, and physiological responses to military training of Officer Cadets from a Gulf Cooperation Council country.

Methods: One hundred and nineteen Officer Cadets volunteered; body composition, core body temperature, aerobic fitness, hydration status (urine osmolality), cardiovascular strain, physical activity (3-dimensional accelerometry), and energy expenditure (doubly labelled water) were measured over 5-days of Basic Training (BT), Army Training (AT), Navy Training (NT), and Air Force Training (AFT).

Results: There were no differences between courses for body mass index (mean all courses: 24.

Influence of hydration volume and ambient temperature on physiological responses while wearing CBRN protective clothing.

This study examined a low (L; 5 ml/kg per h) and high (H, 10 ml/kg per h) rate of fluid replacement in moderate (18°C) and hot (30°C) conditions on physiological responses while wearing personal protective equipment (PPE). PPE included the gas-tight suit (GTS), the powered respirator protective suit (PRPS) and the civil responder 1 (CR1). Relative to the moderate condition, physiological responses were greater in the hot condition.

Plasma catecholamine and nephrine responses to brief intermittent maximal intensity exercise.

Catecholamines (noradrenaline, NA; adrenaline, AD; dopamine, DA) influence the metabolic and cardiovascular responses to exercise. However, changes in catecholamine metabolism during exercise are unclear. Plasma normetanephrine (NMET), metanephrine (MET) and catecholamine responses to a laboratory-based model of games-type exercise were examined.

Quantification of the decay and re-induction of heat acclimation in dry-heat following 12 and 26 days without exposure to heat stress.

Compared with the induction of heat acclimation (HA), studies investigating the decay and re-induction of HA (RA) are relatively sparse and have yielded conflicting results. Therefore, 16 semi-nude men were acclimated to dry-heat by undertaking an exercise protocol in a hot chamber (dry-bulb temperature 46.1 +/- 0.

Alkalosis and the plasma catecholamine response to high-intensity exercise in man.

Purpose: The aims of this study were to examine the plasma dopamine response to a controlled bout of short-duration high-intensity exercise and investigate the magnitude of the plasma dopamine (DA), norepinephrine (NE), and epinephrine (EPI) responses to this exercise after induced alkalosis.

Methods: Eight male subjects were given in randomized order either; PLAC 0.3 g.