| Effectiveness of Preacclimatization Strategies for High-Altitude Exposure |
Jan 2013 |
10 pages |
| Authors:
Charles S Fulco; Beth A Beidleman; Stephen R Muza; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
|
 | Acute mountain sickness (AMS) and large decrements in endurance exercise performance occur when unacclimatized individuals rapidly ascend to high altitudes. Six altitude and hypoxia preacclimatization strategies were evaluated to determine their effectiveness for minimizing AMS and improving performance during altitude exposures. Strategies using hypobaric chambers or true altitude were much more effective overall than those using normobaric hypoxia (breathing, 20.9% oxygen). |
|
| Marginal Ice Zone (MIZ) Program: Science and Experiment Plan |
Oct 2012 |
52 pages |
| Authors:
Craig M Lee; Sylvia Cole; Martin Doble; Lee Freitag; Phil Hwang; Steve Jayne; Martin Jeffries; Rick Krishfield; Ted Maksym; Wieslaw Maslowski; WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
|
| The Marginal Ice Zone (MIZ) intensive field program will employ an array of cutting-edge autonomous platforms to characterize the processes that govern Beaufort Sea MIZ evolution from initial breakup and MIZ formation though the course of the summertime sea ice retreat. Instruments will be deployed on and under the ice prior to initial formation of the MIZ along the Alaska coast, and will continue sampling from open water, across the ... |
|
| Reduction of Risk for Low Back Injury in Theater of Operations |
Oct 2012 |
7 pages |
| Authors:
William S Quillen; John Mayer; UNIVERSITY OF SOUTH FLORIDA TAMPA
|
| Specific aim: The specific aim of this project is to assess the effectiveness of a high intensity progressive resistance exercise training program targeting the l umbar extensors to improve lumbar extensor muscular strength and endurance (the desired physiological responses) in US Army Soldiers. Hypothesis: A high intensity progressive resistance exercise for the lumbar extensors will result in a 25% increase in lumbar extensor muscular strength and endurance compared with control ... |
|
| Examination of Pull-Ups and Push-Ups as Possible Alternatives to the Flexed Arm Hang on the Marine Corps Physical Fitness Test |
15 Jun 2011 |
52 pages |
| Authors:
Brian Mcguire; Jr Vickers Ross R; John H Reynolds; Anne Curry; Timothy Bockelman; Ryan Massimo; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| The Flexed-Arm Hang (FAH) has been an event on the Marine Corps Physical Fitness Test since 1975. This study evaluated alternative tests that would avoid deficiencies in the FAH as a test of dynamic upper body strength and determine the best test of dynamic upper body strength for female Marines within certain parameters (e.g., minimal equipment, training for the test enhances physical performance in dynamic military tasks). The sample consisted ... |
|
| Body Mass Bias in a Combat Fitness Test |
07 Feb 2011 |
46 pages |
| Authors:
Jr Vickers Ross R; John H Reynolds; Brian J McGuire; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Allometric theory predicts that, pound for pound, lighter individuals will perform better than heavier individuals on strength and endurance tests. This study evaluated body mass bias as a factor in the U.S. Marine Corps Combat Fitness Test (CFT), a test consisting of movement to contact (Movement), an ammunition can lift (Lift), and maneuver under fire (Maneuver). Allometric modeling indicated small to moderate biases, favoring lighter Marines for each CFT element. ... |
|
| Effects of Physical Training in Military Populations: A Meta-Analytic Summary |
25 Oct 2010 |
34 pages |
| Authors:
Jr Vickers Ross R; Amanda C Barnard; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Military physical training should increase combat readiness. Ability-performance modeling studies have shown that muscular strength and cardiovascular endurance are the keys to effective task performance, so training that improves these abilities improves readiness. This meta-analysis, which synthesized military physical training studies, showed that standard training practices produced large gains in muscular endurance and cardiovascular endurance. Standard training practices produced only minor improvements in muscular strength. Situational constraints limit the training ... |
|
| A Latent Trait Model of Simulated Combat Performance |
17 Feb 2010 |
25 pages |
| Authors:
Jr Vickers Ross R; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Military personnel perform many physically demanding tasks. Identifying the physical abilities that influence performance will contribute to the design of efficient physical training programs. Causal models were constructed to evaluate aerobic capacity (AC), anaerobic power (AP), and muscle endurance (ME) as potential causes of general performance (GP). Five simulated combat tasks defined GP. AP and AC, but not ME, influenced GP. The AP-AC combination contrasted with general strength (GS)-AC models ... |
|
| Comparison of an Intermittent Hypoxic Exposure Acclimatization Program to Staging at Moderate Altitude on Endurance Performance at 4300 m |
Oct 2009 |
12 pages |
| Authors:
Stephen R Muza; Charles S Fulco; Beth A Beidleman; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
|
| Endurance performance decreases upon initial exposure to altitude but improves following acclimatization induced by continuous altitude residence. For low-altitude residents, acclimatization to a target altitude can be induced by temporarily residing (staging) at moderate altitudes. However, staging may not be available or logistically practical for low altitude-based Warfighters needing to rapidly ascend to high altitude. An alternative method for inducing altitude acclimatization, termed intermittent hypoxic exposure (IHE), may provide an ... |
|
| Reflective Inserts to Reduce Heat Strain in Body Armor: Tests With and Without Irradiance |
AUG 2007 |
6 pages |
| Authors:
Bruce S. Cadarette; William R. Santee; Scott B. Robinson; Michael N. Sawka; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA THERMAL AND MOUNTAIN MEDICINE DIVISION
|
| Delivered by U.S . Army Soldier IP : 153.103.190.11 Tue, 04 Dec 2007 irradiance. Aviat Space Environ Med 2007; 78:809 13. Background: This study evaluated adding reflective thermal inserts (RTI) to reduce the physiological strain during exercise-heat stress with a radiant load. RTI were used with a U.S. Army desert battle dress uniform, body armor, and helmet. Methods: Four male volunteers attempted four trials (10 min rest followed by 100 ... |
|
| Real Time Thermoregulatory Model for Extreme Cold Stress: Applicable to Objective Force Warrior (OFW) |
JAN 2003 |
72 pages |
| Authors:
Xiaojiang Xu; Gordon Giesbrecht; Richard Gonzalez; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| A mathematical model for predicting shivering and thermoregulatory responses during long term cold exposure has been developed and validated. The basis for this model is a six-cylinder mathematical model of human temperature regulation which was well validated (Xu and Werner, Appl. Human Sci. 16:61-75, 1997) for dynamic conditions: incorporating heat, cold (less than 2 hours), clothing systems, and exercise. To what extent shivering is maintained over a long duration is ... |
|
| Effects of Endurance and Resistance Training on Cardiovascular Risk in Military Eligible Women |
OCT 2001 |
154 pages |
| Authors:
Andrew W. Gardner; Eric T. Poehlman; MARYLAND UNIV BALTIMORE
|
| The overall Hypothesis is that the decline in physical activity habits and resultant increase in body fat reduce exercise capacity and muscle mass in military women. These lifestyle changes worsen cardiovascular risk factors. Therefore, continued involvement in resistance and endurance training exercise programs, which increases or preserves fat free mass, as well as enhances physical activity will prevent functional declines in military-eligible women. Although exercise is frequently recommended to enhance ... |
|
| Effects of a World Record Unsupported Ski Trek Across Greenland (The G2 Expedition) on Physical Performance and Body Composition |
AUG 2001 |
38 pages |
| Authors:
P. N. Frykman; E. A. Harman; J. F. Patton; P. K. Opstad; R. W. Hoyt; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Prolonged exhaustive physical exertion is often predicted to result in reduced performance capacity ("overtraining"), through mechanisms of tissue breakdown and inadequate time for full recuperation. This is of importance in military operations, where sustained performance is a typical requirement. We had the opportunity to test the hypothesis that highly motivated men pushed to the limits of their endurance capacity would suffer physical breakdown. Two, 25 year old, Norwegian Navy, Sea, ... |
|
| U.S. Coast Guard Guide for the Management of Crew Endurance Risk Factors - Version 1.0 |
MAY 2001 |
|
| Authors:
Carlos A. Comperatore; Anita M. Rothblum; Pik K. Rivera; Leonard C. Kingsley; Antonio B. Carvalhais; COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT
|
 | A ship's endurance depends on how long it can support operations at sea without replenishing supplies or requiring in-port maintenance. Similarly, crew endurance can be described as a function of physiological and psychological resources that support crew members ability to perform their jobs effectively. Recent studies of Coast Guard personnel on cutters, at small boat stations, and at air stations have shown that some of our traditional work practices can ... |
|
| Anti-Icing Endurance Time Tests of Two Certified SAE Type 1 Aurcraft Deicing Fluids |
APR 2001 |
68 pages |
| Authors:
Kathy Bouchard; Jean-Louis Laforte; Arlene Beisswenger; QUEBEC UNIV CHICOUTIMI
|
| This report presents the results of Anti-Icing Endurance Time (AET) tests performed with unsheared samples of two certified SAE Type I aircraft deicing fluids from September 5 to October 15, 1999, at the Anti-Icing Materials International Laboratory (AMIL). Over 100 tests, including 25 calibration and 50 fluid tests, were conducted at various temperatures and icing intensities, under the six environmental conditions addressed in the holdover time (HOT) guidelines published by ... |
|
| Acute Recovery of Physiological and Cognitive Function in U.S. Army Ranger Students in a Multistressor Field Environment |
01 MAR 2001 |
10 pages |
| Authors:
Karl E. Friedl; Mary Z. Mays; Tim R. Kramer; Ronald L. Shippee; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The time course for soldier recovery and reentry to the battlefield following high intensity direct action missions is of importance to unit commanders and military planners. It also provides a critical background understanding for medical researchers investigating approaches to extend the limits of soldier physical and psychological endurance. This report summarizes findings for soldiers followed through two recovery periods, during and after, a prolonged exhaustive military activity, the U.S. Army ... |
|
| The Biochemical and Physiological Effects of 95 Days Endurance Exercise in Negative Energy Balance |
01 MAR 2001 |
|
| Authors:
M. A. Stroud; DEFENCE RESEARCH AGENCY FARNBOROUGH (UNITED KINGDOM) CENTRE FOR HUMAN SCIENCES
|
| In times of war, men push themselves to physical limits well beyond those that are conventionally thought possible, and hence it is extremely difficult to predict the limits of endurance capabilities using laboratory based studies. Of course, studies can be performed examining military exercises, although motivation levels may not be maximal and it is perhaps better to study rigorous military selection processes, where intense competition maximizes the psychological drives. This ... |
|
| Determination of Total Daily Energy Requirements and Activity Patterns of Service Women |
OCT 2000 |
29 pages |
| Authors:
James P. DeLany; LOUISIANA STATE UNIV AND AGRICULTURAL AND MECHANICAL COLL BATON ROUGE
|
| The objective of the current study is to define a range of energy requirements of servicewomen, defining the variation as it relates to jobs, military settings, and activity patterns. This is crucial information needed not only for determination of nutritional requirements for energy balance, but specific nutrient density standards for servicewomen. Total daily energy expenditure is measured using the doubly labeled water (DLW) method. Activity patterns from actigraphs will be ... |
|
| A Physiological Strain Index (PSI) to Evaluate Heat Stress |
JUL 1999 |
58 pages |
| Authors:
Daniel S. Moran; Kent B. Pandolf; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Although there are many heat strain indices, we found that they were valid only under certain and specific conditions. The present study suggests a simple valid physiological strain index (PSI) to evaluate heat stress either on- line or when data analysis is applied. This index should be easier to interpret and use than other indices available, and includes the ability to depict rest and recovery periods. PSI is capable of ... |
|
| Simultaneous Strength and Endurance Training |
01 APR 1999 |
136 pages |
| Authors:
Roy C. Waggoner; ARMY WAR COLL CARLISLE BARRACKS PA
|
| The purpose of this study is to identify the exact workouts required to simultaneously achieve optimum improvement in I Repetition Maximum (RM) strength, muscle endurance and cardiovascular endurance. The first section identifies the physiological adaptations to each type of training, and using these, the second and third sections identify the optimum application of the acute variables to a periodized training program. The fourth section reviews studies done to date on ... |
|
| Female Acceleration Tolerance Enhancement (FATE) Project |
APR 1998 |
17 pages |
| Authors:
James W. Dooley; Robert M. SHaffstall; Christopher M. Hearon; AIR FORCE RESEARCH LAB BROOKS AFB TX HUMAN EFFECTIVENESS DIRECTORATE
|
| To support the 1993 U.S. Secretary of Defense directive to open combat aircraft assignments to women, investigators of the Female Acceleration Tolerance Enhancement (FATE) Project determined female and male subjects' G- protective equipment fit and their tolerance/endurance to simulated aerial combat maneuvers (SACM). Methods: A study of female subjects previously conducted in our laboratory, employing a +4.5 to +7Gz SACM (4.5-7 SACM), indicated women ... |
|
| The Efficacy of Hypnotic-Induced Prophylactic Naps for the Maintenance of Alertness and Performance in Sustained Operations |
FEB 97 |
68 pages |
| Authors:
John A. Caldwell Jr; Roger W. Jones; J. L. Caldwell; Jose A. Colon; Andre Pegues; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| Army aviation units must be capable of sustained operations to achieve a tactical advantage over enemy forces. However, when adequate numbers of personnel are unavailable to staff all shifts 24 hours per day, cognitive efficiency, mood, and motivation rapidly deteriorate because of insufficient sleep. A solution for this problem may be the implementation of a prophylactic napping strategy which allows personnel to store a limited amount of sleep prior to ... |
|
| Effects of Heat Stress and an Encumbered Aviator Uniform on Flight Performance in a UH-60 Helicopter Simulator |
FEB 97 |
134 pages |
| Authors:
Matthew J. Reardon; Nicholas Smythe III; Julia Omer; Beth Helms; Art Estrada; ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL
|
| The effects on flight performance of the four combinations of an unencumbered level-zero MOPP0 aviator battle dress uniform and encumbered MOPP4 over ABDU flight ensemble in cool and hot UH-60 simulator cockpit conditions were evaluated. This report describes the flight performance results. Every 30 minutes, the right seat pilot encountered instrument meteorological conditions and ascended to 2000 feet to perform a 10-minute set of standard maneuvers. After each iteration of ... |
|
| The Impact of Chemical Protective Clothing on Military Operational Performance |
Jan 1997 |
16 pages |
| Authors:
Donald B Headley; Gerald A Hudgens; DONALD CUNNINGHAM; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
|
| Wearing chemical protective clothing (CPC) while conducting military operations limits a soldier's dexterity, mobility, command and control, communications, and endurance. A series of field studies was conducted to identify mission degradations from the protective clothing on the chemically contaminated battlefield. The studies differed in complexity but had a common goal of comparing task performance and endurance of soldiers wearing the full protective ensemble versus wearing the standard military field uniform. ... |
|
| Trauma, Stress & Health: Military Women in Combat, Deployment & Contingency Operations. Recommendations |
MAR 96 |
33 pages |
| Authors:
Robert J. Ursano; Ann E. Norwood; Carol S. Fullerton; Loree K. Sutton; UNIFORMED SERVICES UNIV OF THE HEALTH SCIENCES BETHESDA MD F EDWARD HEBERT SC HOOL OF MEDICINE
|
| At present, military women are confronted by both direct and indirect combat exposure. Military leaders have long recognized that mission readiness requires both the absence of disease and the presence of mental, physical, and spiritual health. However, little is currently known about how the health of military women may be uniquely affected by extreme environments. Such knowledge is essential to meet the health needs of military women and to sustain ... |
|
| The Effects of Differing Glycemic Index Meals on Substrate Utilization and Endurance Performance |
20 OCT 95 |
56 pages |
| Authors:
Steve E. Black; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Few studies have investigated the effects of pre-exercise meals with differing glycemic responses on substrate utilization and endurance performance in subsequent exercise. Those few which have been done have looked at foods of limited application to a pre-exercise meal consumed prior to a morning event. This study investigated the effects of commonly eaten breakfast cereals on exercise performance. Ten physically active male subjects participated in this study. The subjects reported ... |
|
| Adaptations to Three Weeks of Aerobic/Anaerobic Training in West Coast U.S. Navy Sea-Air-Land Personnel (SEALS) |
DEC 94 |
25 pages |
| Authors:
I. Jacobs; W. K. Prusaczyk; H. W. Goforth Jr; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| SEALS must optimize physical training "efficiency" i.e., adaptation per unit training time. This study was designed to determine if a single training program could simultaneously elicit aerobic and anaerobic adaptations. SEALs were assigned to groups matched for initial aerobic and anaerobic fitness. Each group trained on cycle ergometers for 30 min 3 times per week as follows: continuous (CNT; n=8) at 70% VO sub 2peak; intermittent (TNT; n=6) at an ... |
|
| System Test Results of the Advanced Technology Anti-G Suit (ATAGS) |
NOV 92 |
10 pages |
| Authors:
Larry J. Meeker; John H. Olhausen; Grady L. Ripley; ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE
|
| Previous centrifuge and flight testing have shown that the ATAGS offers superior G endurance protection even when operated at lower pressures than the standard anti-G suit. All of the previous ATAGS testing was done, however, using human test subjects for the purpose of evaluating G protection. The purpose of the parametric tests was to provide basic system data such as volumes, fill rates and pressure differentials for the ATAGS. In ... |
|
| Simulated Approach Marches During Thermal Stress: A P2NBC2 Study |
SEP 92 |
102 pages |
| Authors:
W. R. Santee; W. T. Matthew; W. J. Tharion; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| A P2NBC2 sponsored study of eight subjects on simulated 12 mile approach marches in MOPP-0, MOPP-1 and MOPP-4 was conducted at Fort Bliss, Texas in August, 1991. The P2NBC2 objective is to study, physiology and psychology within the context of militarily relevant tasks in the NBC environment. The, focus of the present study was model evaluation, but the study included simulated marksmanship, performance In MOPP-0 and MOPP-1, and data collection ... |
|
| Focused Ultrasound to Inspect Locking Keys in Engine Valves. |
MAY 1990 |
|
| Authors:
V. R. Dahlmann
|
|
| Synchros and Resolvers: Part II. |
MAY 1990 |
|
| Authors:
C. Deirmengian
|
|
| Plasma Volume Expansion in Rats: Effects on Thermoregulation and Exercise |
1989 |
7 pages |
| Authors:
R. P. Francesconi; M. Bosselaers; C. Matthew; R. W. Hubbard; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Administration of polyethylene glycol (PEG, intraperitioneal, 3 ml, 30% solution) to adult male rats (300 g) resulted in an approx. 20% increment in plasma volume (PV) 24 H after PEG injection. When these animals were exercised (9.14) m/min, level treadmill) in a warm (30 C, 30-40% relative humidity) environment, their mean endurance was increased from 67.9 (saline-treated controls CONT) to 93.6 min (P< 0.01). Total water loss was increased from ... |
|
| Nerve Agent Antidotes and Heat Exposure: Summary of Effects on Task Performance of Soldiers Wearing BDU (Battle Dress Uniform) and MOPP-IV (Mission Oriented Protective Posture) Clothing Systems |
JUL 88 |
|
| Authors:
John L. Kobrick; Richard F. Johnson; Donna J. McMenemy; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The logistical significance of chemical weapons in future warfare demands that nerve agent antidotes be available for troops exposed to chemical attack. Since future combat operations will most likely occur in tropical and desert areas, chemical attacks in such areas could lead to situations involving the use of nerve agent antidotes by troops during exposure to hot and hot-humid conditions. Virtually no data are available to estimate performance capabilities on ... |
|
| The Impact of Hyperthermia and Hypohydration on Circulation, Strength, Endurance, and Health |
05 FEB 88 |
|
| Authors:
Lawrence E. Armstrong; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| This article reviews the effects of hot environments--and thus hyperthermia and hypohydration--on circulation, strength, endurance, and health in athletes. The cardiovascular responses to heat exposure at rest, and during exercise, are reviewed. Performance is reviewed by examining strength, power and endurance; the impact of hyperthermia, hypohydration and diuretic use on performance are discussed. The physiological needs for water, salt and carbohydrates have been examined. The four major heat illnesses (i.e. ... |
|
| Influence of Altitude and Caffeine during Rest and Exercise on Plasma Levels of Proenkephalin Peptide F |
FEB 88 |
|
| Authors:
William J. Kraemer; Paul B. Bock; Charles S. Fulco; Scott E. Gordon; Jeff P. Bonner; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The purpose of this study was to examine the resting and exercise response patterns of plasma Peptide F immunoreactivity (ir) to altitude exposure (4300m) and caffeine ingestion (4mg.KgBW-1). Nine healthy male subjects performed exercise tests to exhaustion at sea level, during an acute altitude exposure (1 hr. hypobaric chamber) and after a chronic (17 day sojourn) altitude exposure. Using a randomized, double-blind/placebo experimental design, a placebo or caffeine drink was ... |
|
| Plasma Volume Expansion in Rats: Effects on Thermoregulation and Exercise |
FEB 88 |
|
| Authors:
R. P. Francesconi; M. Bosselaers; C. Matthew; R. Hubbard; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| Administration of polyethlene glycol (PEG, intraperitoneal, 3ml, 30% solution) to adult, male rats (300g) resulted in an approximate 20% increment in plasma volume (PV) 24 h after PEG injection. When these animals were exercised (9.14 m/min, level treadmill) in a warm 30 C, 30-40% rh) environment, their mean endurance was increased from 67.9 min (saline-treated controls, CONT) to 93.6 min. Total water loss was increased from 12.2g (CONT) to 17.2 ... |
|
| Effects of Nerve Agent Antidote and Heat Exposure on Soldier Performance in the BDU (Battle Dress Uniform) and MOPP-IV (Mission Oriented Protective Posture) Ensembles |
88 |
|
| Authors:
John L. Kobrick; Richard F. Johnson; Donna J. McMenemy; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| This study assessed effects of nerve agent antidote (atropine/2-PAM chloride versus saline placebo) and heat-humidity (95 F/60%RH versus 70 F/30%RH) on repeated performance of militarily-relevant psychological tasks while wearing the battle dress uniform (BDU) and while wearing chemical protective clothing (MOPP-IV). All BDU heat sessions (6 hours) were completed, but with some task impairments and a few subjective reactions. MOPP-IV heat sessions could not be continued beyond two hours; all ... |
|
| Behavioral, Psychological, and Demographic Predictors of Physical Fitness |
14 DEC 87 |
|
| Authors:
Terry L. Conway; NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA
|
| Achieving higher levels of physical fitness has become a goal of many Americans both for personal reasons (e.g., improved health, appearance, and perceived well-being) and for organizational reasons (e.g., corporate cost savings with healthy employees; operational readiness for the military services) . Understanding the factors which relate to physical fitness could help people improve their fitness levels. This study examined 1,357 Navy men to determine the associations between a variety ... |
|
| Human Performance and Acute Hypoxia. Chapter 12 |
NOV 87 |
52 pages |
| Authors:
Charles S. Fulco; Allen Cymerman; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| The effects of a reduction in ambient oxygen pressure occurring within four hours are dependent to a large extent on one principal factor: the degree of hypoxia and the resultant arterial hypoxemia. As the degree of hypoxia increases, a series of compensatory responses occur in various organ systems which are directly proportional to the severity. Above approximately 1500 m, demonstrable changes become evident in ventilation, cardiac output, circulation, blood endocrine ... |
|
| Exercise Endurance Time as a Function of Percent Maximal Power Production |
JUL 86 |
34 pages |
| Authors:
Everett A. Harman; Howard G. Knuttgen; Peter N. Frykman; John F. Patton; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| To develop and statistically validate a mathematical model of the relationship between endurance time (T) and power production, 15 male subjects were first tested for maximal power on an instrumented cycle ergometer at 60 RPM. On subsequent days they were tested for T at various percentages of maximal power. Curves of T as a function of percent maximal power were curvilinear, and could be made to overlap among subjects by ... |
|
| Proceedings of the Army Science Conference (15th) Held at West Point, New York on 17-19 June 1986. Volume 3. Principal Authors M through R |
20 JUN 86 |
|
| Authors:
DEPUTY CHIEF OF STAFF FOR RESEARCH DEVELOPMENT AND ACQUISITION (ARMY) WASHINGTON D C
|
| Partial contents: Medical defense against saxitoxin; Wide spectral range laser research; Gas phase combustion chemistry of nitramine propellants; Improved modeling of fracture in ceramic armors; CW agent detection by lidar returns from ensembles of optically large particles; Nonlinear mechanics of granular media--A practical application of soliton dynamics? Factors limiting endurance of armor, artillery and infantry units under simulated NBC conditions, Predicting tensile failure stresses in metal matrix composites; Parametric study ... |
|
| Carbamate Induced Performance Decrement Restored with Diazepam and Atropine in Rats |
JUN 86 |
|
| Authors:
Candace B. Matthew; Roger W. Hubbard; Ralph P. Francesconi; Glenn J. Thomas; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| When rats (500g, male) are exercised to exhaustion on a treadmill, pretreatment with the carbamate physostigmine reduces endurance capacity. Our objective was to determine whether pharmacological intervention could reverse these decrements in performance. The following drugs were administered separately via tail vein: vehicle-control (C), atropine (200 ug/kg, A), diazepam (500 ug/kg, D), and physostigmine (200 ug/kg, PH). After drug administration, rats were run (11 m/min, 6 deg elevation, Ta = ... |
|
| USSR Report, Space Biology and Aerospace Medicine, No. 1, January- February 1986 |
17 APR 1986 |
161 pages |
| Authors:
JOINT PUBLICATIONS RESEARCH SERVICE ARLINGTON VA
|
|
| Body Composition and Muscle Performance Aspects of the 1985 CFFS (Combat Field Feeding System) Test |
APR 86 |
|
| Authors:
Marilyn A. Teves; James A. Vogel; Dawn E. Carlson; David D. Schnakenberg; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| A new combat field feeding system (CFFS) has been developed to provide soldiers with one to two hot meals at a minimal labor cost. The tray pack ration (T-ration) which requires no preparation or refrigeration and needs only to be heated is the ration under examination. Soldiers were tested before, during and after a 44 days field exercise to compare the T-ration to various combinations of existing feeding systems. Body ... |
|
| Atropine and Thermoregulation in Man (A Report of Three Studies) |
JUN 85 |
|
| Authors:
Leslie Levine; Bruce S. Cadarette; Richard R. Gonzalez; William L. Holden; Margaret A. Kolka; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| This report summarizes the findings of three studies which concerned atropine-impaired thermoregulation in male soldiers who exercised in hot environments. Study I examined the effects of field applicable doses (2, 4 mg im.) of atropine on soldiers in fatigue uniforms who walked in a hot-dry (40 C/ 20% rh) environment; the gradation of these effects with increased dosage (0, 0. 5, 1, 2 and 4 mg); and the repeatability of ... |
|
| Atropine, Stress and Human Performance |
OCT 1984 |
|
| Authors:
Harold L. Williams; John Carney; Frank A. Holloway; OKLAHOMA UNIV HEALTH SCIENCES CENTER OKLAHOMA CITY
|
| These experiments examined atropine dose-related effects (0.5, 1.0, and 2.0 mg) alone and atropine pulse predose exercise effects on physiology, cognitive performance and self-reports in 12 healthy young men. Recent studies suggest that tasks that load perceptual processes may be more sensitive to atropine than tasks that load motor functions. Work with rodents suggested that prior exercise might potentiate the effects of atropine in man. Atropine had biphasic dose-related effects ... |
|
| Electromyographic Analysis of the Peroneous Longus during Bicycle Ergometry across Work Load and Pedal Type |
1983 |
|
| Authors:
Danny Lee Holt; AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
|
| Lateral ankle injuries often result in residual disability. Increasing the endurance of the peroneous longus may reduce this problem. Bicycle ergometry may increase the endurance of the peroneous longus, but the activity of the peroneous longus during pedaling is not known. The purpose of this study was to analyze the electromyographic (EMG) activity of the peroneous longus across work load (1, 2, and 3 Kp) and pedal type (standard and ... |
|
| Sleep Deprivation and Exercise Tolerance |
JAN 1982 |
|
| Authors:
Bruce J. Martin; INDIANA UNIV AT BLOOMINGTON SCHOOL OF MEDICINE*
|
| The purpose of the study is to identify the effects of sleep deprivation on the ability of humans to tolerate standard forms of endurance exercise. Standard techniques in human exercise physiology are utilized. To date, the results indicate that acute sleep loss of 30 to 36 hours (a) does not alter the maximal oxygen uptake, while it does reduce maximal heart rate; (b) leaves metabolic rate during exercise at a ... |
|
| Perception of Effort during Constant Work to Self-Imposed Exhaustion |
22 DEC 1977 |
27 pages |
| Authors:
Donald H. Horstman; William P. Morgan; Allen Cymerman; James Stokes; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MA
|
| This study describes the pattern of change in effort sense and the value of this pattern in predicting work end point at relatively high work intensity (80% VO2 max). Patterns of change of various physiological functions were also observed. Two modes of work (walking and running) were compared to ascertain generalizability of results. Subjects were 26 healthy male volunteers. Time to exhaustion (ET) did not differ between walking and running. ... |
|
| The Nature of the Perception of Effort at Sea Level and High Altitude, |
16 DEC 1977 |
|
| Authors:
Donald H. Horstman; Richard Weiskopf; Sumner Robinson; ARMY RESEARCH INST OF ENVIRONMENTAL MEDICINE NATICK MASS
|
| This study compared the Rating of Perceived Exertion (RPE) and selected physiological measures, during both short term and prolonged work of equal relative intensities (i.e., % VO2 max), at 4300 m to those at sea level. Ss (N = 20) performed bicycle work at supramaximal intensities, for six minutes each at 60, 80 and 95% VO2 max and to exhaustion at 85% VO2 max. At 4300 m, VO2 max was ... |
|
| Product Improvement Test of Cartridge, 4.2-Inch, HE, M329A1E1 (Improved Lightweight Cartridge). |
APR 1973 |
|
| Authors:
William M. Reeves; ABERDEEN PROVING GROUND MD MATERIEL TESTING DIRECTORATE
|
| A product improvement test was conducted at Aberdeen Proving Ground (APG) to provide sufficient test data on cartridge, 4.2-inch, HE, M329A1E1 in order that a recommendation relative to item suitability for US Army use can be made and to compare the test M329A1E1 cartridge with the standard M329A1 cartridge. Infantry Board representatives performed the service test portions of the test and submitted a test report which is incorporated into this ... |
|
Reports by Keyword(s)
ENDURANCE(PHYSIOLOGY)
