Physiological and Cognitive Factors Related to Human Performance During the Grand Canyon Rim-to-Rim Hike

Exposure to extreme environments is both mentally and physically taxing, leading to suboptimal performance and even life-threatening emergencies. Physiological and cognitive monitoring could provide the earliest indicator of performance decline and inform appropriate therapeutic intervention, yet little research has explored the relationship between these markers in strenuous settings. The Rim-to-Rim Wearables at the Canyon for Health (R2R WATCH) study is a research project at Sandia National Laboratories funded by the Defense Threat Reduction Agency to identify which physiological and cognitive phenomena collected by non-invasive wearable devices are the most related to performance in extreme environments. In a pilot study, data were collected from civilians and military warfighters hiking the Rim-to-Rim trail at the Grand Canyon. Each participant wore a set of devices collecting physiological, cognitive, and environmental data such as heart rate, memory, ambient temperature, etc. Promising preliminary results found correlates between physiological markers recorded by the wearable devices and decline in cognitive abilities, although further work is required to refine those measurements. Planned follow-up studies will validate these findings and further explore outstanding questions.

[1]  C. Eriksen,et al.  Effects of noise letters upon the identification of a target letter in a nonsearch task , 1974 .

[2]  E. Coyle,et al.  Influence of graded dehydration on hyperthermia and cardiovascular drift during exercise. , 1992, Journal of applied physiology.

[3]  Ellis Hd,et al.  Cold and performance: the effects of information load, analgesics, and the rate of cooling. , 1985 .

[4]  Enander Ae,et al.  Effects of thermal stress on human performance. , 1989 .

[5]  Hans-Ullrich Balzer,et al.  Psychological and Psychophysiological Effects of a High-Mountain Expedition to Tibet , 2005 .

[6]  Edward K. Vogel,et al.  The capacity of visual working memory for features and conjunctions , 1997, Nature.

[7]  P. F. Iampietro,et al.  Work Performance After Dehydration: Effects of Physical Conditioning and Heat Acclimatization , 1958, Journal of applied physiology.

[8]  Robert G. Abbott,et al.  Rim-to-Rim Wearables at the Canyon for Health (R2R WATCH): Experimental Design and Methodology , 2017, HCI.

[9]  Adrian J. Ecker,et al.  Development and Validation of the Cognition Test Battery for Spaceflight. , 2015, Aerospace medicine and human performance.

[10]  H D Ellis,et al.  The Effects of Cold on the Performance of Serial Choice Reaction Time and Various Discrete Tasks , 1982, Human factors.

[11]  Juris Terauds,et al.  Science in Sports , 1979 .

[12]  T P Garigan,et al.  Death from hyponatremia as a result of acute water intoxication in an Army basic trainee. , 1999, Military medicine.

[13]  B. N. Gupta,et al.  Cardiac stress in glass bangle workers , 2004, European Journal of Applied Physiology and Occupational Physiology.

[14]  Kåre Rodahl,et al.  Physiology Of Work , 1989 .

[15]  B. MCARDLE,et al.  Physiology of Man in the Desert , 1948, Nature.

[16]  M. Sawka,et al.  Aerobic fitness and the hypohydration response to exercise-heat stress. , 1984, Aviation, space, and environmental medicine.

[17]  A E Enander.  Effects of thermal stress on human performance. , 1989, Scandinavian journal of work, environment & health.

[18]  M. Sawka,et al.  Hydration effects on thermoregulation and performance in the heat. , 2001, Comparative biochemistry and physiology. Part A, Molecular & integrative physiology.

[19]  D. Costill,et al.  Influence of diuretic-induced dehydration on competitive running performance. , 1985, Medicine and science in sports and exercise.

[20]  John R. Thomas,et al.  Quantification of Special Operations Mission-Related Performance: Operational Evaluation of Physical Measures , 1997 .

[21]  L. E. Bourne,et al.  Stress and Cognition: A Cognitive Psychological Perspective , 2003 .

[22]  Allen Cymerman,et al.  Cysteinyl leukotriene blockade does not prevent acute mountain sickness. , 2004, Aviation, space, and environmental medicine.

[23]  Steven Stephanides.  Over the Edge: Death in the Grand Canyon , 2002 .

[24]  K B Pandolf,et al.  Hypohydration and exercise: effects of heat acclimation, gender, and environment. , 1983, Journal of applied physiology: respiratory, environmental and exercise physiology.

[25]  David L. Strayer,et al.  Cognitive Function at High Altitude , 1993, Human factors.

[26]  K Rodahl,et al.  Occupational health conditions in extreme environments. , 2003, The Annals of occupational hygiene.

[27]  R. Silberstein,et al.  Evaluation of cognitive performance in the heat by functional brain imaging and psychometric testing. , 2001, Comparative biochemistry and physiology. Part A, Molecular & integrative physiology.

[28]  N. Cowan.  The magical number 4 in short-term memory: A reconsideration of mental storage capacity , 2001, Behavioral and Brain Sciences.

[29]  Christopher D. Wickens,et al.  Human Factors in High-Altitude Mountaineering , 2015 .

[30]  Jin Fan,et al.  The activation of attentional networks , 2005, NeuroImage.

[31]  Robert L Kane,et al.  Neuropsychological assessment in extreme environments. , 2007, Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists.

[32]  J. Veltman,et al.  Physiological workload reactions to increasing levels of task difficulty. , 1998, Ergonomics.

[33]  Michael Ian Lambert,et al.  The Quantification of Training Load, the Training Response and the Effect on Performance , 2009, Sports medicine.

[34]  W F Grether,et al.  Human performance at elevated environmental temperatures. , 1973, Aerospace medicine.

[35]  K B Pandolf,et al.  Thermoregulatory and blood responses during exercise at graded hypohydration levels. , 1985, Journal of applied physiology.

[36]  P A Hancock,et al.  Human occupational and performance limits under stress: the thermal environment as a prototypical example. , 1998, Ergonomics.

[37]  Bruno Chenuel,et al.  Sleep Management Strategy and Performance in an Extreme Mountain Ultra-marathon , 2015, Research in sports medicine.

[38]  N. B. Strydom,et al.  The effects of different levels of water deficit on physiological responses during heat stress , 2004, Internationale Zeitschrift für angewandte Physiologie einschließlich Arbeitsphysiologie.