title: The Effects of Load Carriage and Physical Fatigue on Cognitive Performance.
abstract: In the current study, ten participants walked for two hours while carrying no load or a 40 kg load. During the second hour, treadmill grade was manipulated between a constant downhill or changing between flat, uphill, and downhill grades. Throughout the prolonged walk, participants performed two cognitive tasks, an auditory go no/go task and a visual target detection task. The main findings were that the number of false alarms increased over time in the loaded condition relative to the unloaded condition on the go no/go auditory task. There were also shifts in response criterion towards responding yes and decreased sensitivity in responding in the loaded condition compared to the unloaded condition. In the visual target detection there were no reliable effects of load carriage in the overall analysis however, there were slower reaction times in the loaded compared to unloaded condition during the second hour.
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America; Department of Psychology, Tufts University, Medford, Massachusetts, United States of America.
authors.forename: Marianna D
authors.initials: MD
authors.lastname: Eddy
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Leif
authors.initials: L
authors.lastname: Hasselquist
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America; Department of Psychology, Tufts University, Medford, Massachusetts, United States of America.
authors.forename: Grace
authors.initials: G
authors.lastname: Giles
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Jacqueline F
authors.initials: JF
authors.lastname: Hayes
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Jessica
authors.initials: J
authors.lastname: Howe
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Jennifer
authors.initials: J
authors.lastname: Rourke
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Megan
authors.initials: M
authors.lastname: Coyne
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Meghan
authors.initials: M
authors.lastname: O'Donovan
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America.
authors.forename: Jessica
authors.initials: J
authors.lastname: Batty
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America; Department of Psychology, Tufts University, Medford, Massachusetts, United States of America.
authors.forename: Tad T
authors.initials: TT
authors.lastname: Brunyé
authors.affiliation: U.S. Army Natick Soldier Research, Development, and Engineering Center, Natick, Massachusetts, United States of America; Department of Psychology, Tufts University, Medford, Massachusetts, United States of America.
authors.forename: Caroline R
authors.initials: CR
authors.lastname: Mahoney
mesh_terms: D000293:Adolescent; D000328:Adult; D003071:Cognition; D005080:Exercise Test; D005221:Fatigue / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008889:Military Personnel; D018763:Muscle Fatigue / Q000502:physiology; D010101:Oxygen Consumption; D015203:Reproducibility of Results; D016138:Walking / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*; D055815:Young Adult