Applied Physiology, Nutrition, and Metabolism
Published since 1983, this monthly journal focuses on the application of physiology, nutrition, and metabolism to the study of human health, physical activity, and fitness.
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Editor: Terry Graham, Ph.D.
Nutritional status and the gonadotrophic response to a polar expedition
David R. Woods, Simon K. Delves, Sophie E. Britland, Anneliese Shaw, Piete E. Brown, Conor Bentley, Simon Hornby, Anne Burnett, Sue A. Lanham-New, and Joanne L. Fallowfield
Guest editorial by Robert Boushel, Associate Editor of APNM: Polar Syndrome is characterized by changes in thyroid hormone leading to altered energy metabolism, impaired cognitive function, and exercise performance. Another polar phenomenon is hypogonadism — a pattern of reduced testosterone linked to altered hypothalamic-pituitary function associated with body weight loss. Low testosterone is common with acute physiological stress, resulting in reduced RBC production, protein synthesis, muscle strength, bone mass, and fat metabolism. A new study in APNM by UK researchers reveals the benefits of a Cold Climate Ration Diet (6300 kcal; 50%-60% carbohydrate, ~10% protein, ~35% fat) in preventing falling testosterone in subjects on a 5-week expedition to Antarctica in summer. The diet, which exceeded daily energy expenditure (including mountaineering), prevented body mass loss and resulted in increased testosterone. That leutinizing and follicle-stimulating hormones remained unchanged led to the conclusion of a gonadal mechanism underlying increases in serum testosterone independent of hypothalamic-pituitary axis. The authors postulate that diet and light exposure are critical factors ameliorating falling testosterone and physical deterioration in the arctic, and hypothesize that the maintenance of body mass, fat stores, and thus testosterone may be beneficial in the cold arctic. This study is relevant for Canadians considering the launch of the CHARS, hosting of the 2015 Arctic Council meeting in Iqaluit, and the discovery of the lost Franklin ship.
This monthly journal has a 30-year history of publishing, first as the Canadian Journal of Sport Sciences, and later as the Canadian Journal of Applied Physiology.
Applied Physiology, Nutrition, and Metabolism publishes original research articles, reviews, and commentaries, focussing on the application of physiology, nutrition, and metabolism to the study of human health, physical activity, and fitness. The published research, reviews, and symposia will be of interest to exercise physiologists, physical fitness and exercise rehabilitation specialists, public health and health care professionals, as well as basic and applied physiologists, nutritionists, and biochemists.