Career perspective: Kenneth J. Collins
AbstractA career interest in thermoregulation research has included wide contrasts in the subjects of enquiry, extending from heat stroke to hypothermia, special investigations in many different purpose-built climatic chambers, laboratory-based biomedical studies together with hospital practice, and field work in tropical climates to physiological surveys on urban populations in temperate environments. The scientific process and need to focus on careful planning of experiments, using the most appropriate methods, selecting the right controls and eventually applying correct statistical analysis do not always follow a smooth...
Source: Extreme Physiology and Medicine - January 23, 2018 Category: Physiology Source Type: research
Transient cardiac dysfunction but elevated cardiac and kidney biomarkers 24 h following an ultra-distance running event in Mexican Tarahumara
ConclusionsThe athletes participating in this study had acute transient cardiac dysfunction as assessed by echocardiography but elevated cardiac and kidney biomarkers at 24 h following a 63-km race with extreme altitude variation. (Source: Extreme Physiology and Medicine)
Source: Extreme Physiology and Medicine - December 11, 2017 Category: Physiology Source Type: research
Transient cardiac dysfunction but elevated cardiac and kidney biomarkers 24 Â h following an ultra-distance running event in Mexican Tarahumara
ConclusionsThe athletes participating in this study had acute transient cardiac dysfunction as assessed by echocardiography but elevated cardiac and kidney biomarkers at 24 Â h following a 63-km race with extreme altitude variation. (Source: Extreme Physiology and Medicine)
Source: Extreme Physiology and Medicine - December 11, 2017 Category: Physiology Source Type: research
Cardiovascular and thermal strain during 3 –4 days of a metabolically demanding cold-weather military operation
ConclusionsDaily energy expenditures were among the highest observed for a military training exercise, with moderate exercise intensity levels (~65% age-predicted maximal HR) observed. The short-term cold-weather training did not elicit high CV andTpill strain.Tfing andTtoe were also well maintained while skiing, but decreased to values associated with thermal discomfort at rest. (Source: Extreme Physiology and Medicine)
Source: Extreme Physiology and Medicine - September 6, 2017 Category: Physiology Source Type: research
Cardiovascular and thermal strain during 3 –4 days of a metabolically demanding cold-weather military operation
ConclusionsDaily energy expenditures were among the highest observed for a military training exercise, with moderate exercise intensity levels (~65% age-predicted maximal HR) observed. The short-term cold-weather training did not elicit high CV andTpill strain.Tfing andTtoe were also well maintained while skiing, but decreased to values associated with thermal discomfort at rest. (Source: Extreme Physiology and Medicine)
Source: Extreme Physiology and Medicine - September 6, 2017 Category: Physiology Source Type: research
Measurements of rates of cooling of a manikin insulated with different mountain rescue casualty bags
ConclusionsUnder the still-air conditions of the study, the vacuum mattress/Pertex ©/fibrepile blanket was seen to offer comparable insulation effectiveness compared to be both heavy-weight casualty bags. In turn, these three systems appeared more efficient at insulating the manikin than the Blizzard bag or plastic survival bag. (Source: Extreme Physiology and Medicine)
Source: Extreme Physiology and Medicine - April 20, 2017 Category: Physiology Source Type: research
Nutritional implications for ultra-endurance walking and running events
AbstractThis paper examines the various nutritional challenges which athletes encounter in preparing for and participating in ultra-endurance walking and running events. Special attention is paid to energy level, performance, and recovery within the context of athletes ’ intake of carbohydrate, protein, fat, and various vitamins and minerals. It outlines, by way of a review of literature, those factors which promote optimal performance for the ultra-endurance athlete and provides recommendations from multiple researchers concerned with the nutrition and performa nce of ultra-endurance athletes. Despite the availability o...
Source: Extreme Physiology and Medicine - November 21, 2016 Category: Physiology Source Type: research
In conversation with …Thomas Frederic Hornbein
AbstractWhilst attending a conference in the not too distant past, I was fortunate enough to be seated at lunch next to a very eminent octogenarian academic. Conversation ensued, and I was instantly captivated by his stories. These were not narratives filled with scientific facts, but rather anecdotes of his life and the pathways he had taken to get where he was today. Fascinated by such accounts, I set about the task of interviewing persons of scientific acclaim, to learn more about their life stories and unwritten tales. ‘In conversation with…’ therefore offers readers a chance to share an abridged version of these conve...
Source: Extreme Physiology and Medicine - October 11, 2016 Category: Physiology Source Type: research
In conversation with …Thomas Frederic Hornbein
AbstractWhilst attending a conference in the not too distant past, I was fortunate enough to be seated at lunch next to a very eminent octogenarian academic. Conversation ensued, and I was instantly captivated by his stories. These were not narratives filled with scientific facts, but rather anecdotes of his life and the pathways he had taken to get where he was today. Fascinated by such accounts, I set about the task of interviewing persons of scientific acclaim, to learn more about their life stories and unwritten tales. ‘In conversation with…’ therefore offers readers a chance to share an abridged version of these...
Source: Extreme Physiology and Medicine - October 11, 2016 Category: Physiology Source Type: research
