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Article
Open AccessVitamin D and the hepatitis B vaccine response: a prospective cohort study and a randomized, placebo-controlled oral vitamin D3 and simulated sunlight supplementation trial in healthy adults
To determine serum 25(OH)D and 1,25(OH)2D relationship with hepatitis B vaccination (study 1). Then, to investigate the effects on hepatitis B vaccination of achieving vitamin D sufficiency (serum 25(OH)D ≥ 50 nm...
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Article
Open AccessNutrition and Athlete Immune Health: New Perspectives on an Old Paradigm
Respiratory and gastrointestinal infections limit an athlete’s availability to train and compete. To better understand how sick an athlete will become when they have an infection, a paradigm recently adopted f...
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Article
Open AccessThe dynamic relationships between the active and catabolic vitamin D metabolites, their ratios, and associations with PTH
Vitamin D status, assessed by serum concentration of 25(OH)D, is the prime candidate marker for many disease-association studies, but the interplay between the subsequent 1,25-dihydroxyvitamin D (1,25(OH)2D) and ...
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Article
Carbohydrate supplementation does not blunt the prolonged exercise-induced reduction of in vivo immunity
Carbohydrate (CHO) supplementation during prolonged exercise is widely acknowledged to blunt in vitro immunoendocrine responses, but no study has investigated in vivo immunity.
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Article
Two nights of sleep deprivation with or without energy restriction does not impair the thermal response to cold
In persons completing exhaustive daily exercise, sleep and energy restriction have been highlighted as risk factors for hypothermia in cold environments. The present study therefore sought to determine the eff...
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Article
Assessment of extracellular dehydration using saliva osmolality
When substantial solute losses accompany body water an isotonic hypovolemia (extracellular dehydration) results. The potential for using blood or urine to assess extracellular dehydration is generally poor, b...
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Article
Effects of probiotics supplementation on gastrointestinal permeability, inflammation and exercise performance in the heat
This study aimed to investigate the effects of multi-strain probiotics supplementation on gastrointestinal permeability, systemic markers of inflammation and running performance when exercising in the heat.
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Article
Three nights of sleep deprivation does not alter thermal strain during exercise in the heat
Individuals exposed to total sleep deprivation may experience an increased risk of impaired thermoregulation and physiological strain during prolonged physical activity in the heat. However, little is known of...
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Article
Effect of daily mixed nutritional supplementation on immune indices in soldiers undertaking an 8-week arduous training programme
The aim was to investigate the influence of a daily mixed nutritional supplement during an 8-week arduous training programme on immune indices and mediators including circulating leucocyte counts; bacterially ...
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Article
One night of sleep deprivation decreases treadmill endurance performance
The aim was to test the hypothesis that one night of sleep deprivation will impair pre-loaded 30 min endurance performance and alter the cardio-respiratory, thermoregulatory and perceptual responses to exercis...
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Article
No effect of a 30-h period of sleep deprivation on leukocyte trafficking, neutrophil degranulation and saliva IgA responses to exercise
A one night period without sleep is not uncommon amongst athletes travelling across time zones and military personnel during training and operations. However, the effect of one night without sleep on immune in...
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Article
Nutritional Aspects of Immunosuppression in Athletes
The literature suggests that a heavy schedule of training and competition leads to immunosuppression in athletes, placing them at a greater risk of opportunistic infection. There are many factors which influen...
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Article
Glutamine, Exercise and Immune Function
Glutamine is the most abundant free amino acid in human muscle and plasma and is utilised at high rates by rapidly dividing cells, including leucocytes, to provide energy and optimal conditions for nucleotide ...
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Article
Effect of exercise-induced muscle damage on the blood lactate response to incremental exercise in humans
Eccentric muscle actions are known to induce temporary muscle damage, delayed onset muscle soreness (DOMS) and muscle weakness that may persist for several days. The purpose of the present study was to determ...
