Attempted acclimatization by vigorous exercise during periodic exposures to simulated altitude

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088 ⊔ ⊔ ‡aAMRL TR 67-114
100 1 ⊔ ‡aMurray, Raymond H., ‡d1925- ‡eauthor.
245 1 0 ‡aAttempted acclimatization by vigorous exercise during periodic exposures to simulated altitude / ‡cRaymond H. Murray, Spencer Shropshire, Leonard Thompson.
264 ⊔ 1 ‡aWright-Patterson Air Force Base, Ohio : ‡bAerospace Medical Research Laboratories, Aerospace Medical Division, Air Force Systems Command, United States Air Force, ‡cXXXX
300 ⊔ ⊔ ‡aiii, 11 pages : ‡billustrations ; ‡c28 cm.
336 ⊔ ⊔ ‡atext ‡btxt ‡2rdacontent
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490 0 ⊔ ‡aAMRL-TR ; ‡v67-114 ^A1779489 ^A1779489
500 ⊔ ⊔ ‡a"September 1967."
504 ⊔ ⊔ ‡aIncludes bibliograpic references (pages 10-11).
520 ⊔ ⊔ ‡aAcclimatization to altitude by means of periodic short-term chamber exposures could have military and athletic application by preparing unacclimatized subjects for endurance performance at altitude. Three unconditioned men were trained daily by endurance running for 3 weeks at ground level. Following control measurements, they exercised strenuously on a treadmill 2 hours daily for 17 days in a chamber at a simulated altitude of 2300 meters. Responses were evaluated by: symptoms; maximum work performance (as measured by the duration of exercise-to-tolerance); maximal heart rate; duration of breath-holding; production of lactate and excess lactate; maximum expiratory minute volume and oxygen consumption. During the initial periods of exercise at altitude, maximum work performance fell significantly from control levels (average 23%), with striking symptoms of exhaustion; breath-holding duration fell 13%; the production of excess lactate rose significantly in two subjects. Over the remainder of the altitude exposures exercise performance and breath-holding duration increased to near control levels while fatigue was much less noticeable. Maximal heart rate varied greatly. There was no significant change in maximal oxygen consumption during exercise at altitude, but expiratory minute volume rose slightly. During the period of altitude exposures, symptoms common with chronic exposures (malaise, Cheyne-Stokes respiration, rheumatic complaints) were often noted both in the chamber and at work and at home. (Author).
536 ⊔ ⊔ ‡aThis research was conducted by the Indiana University Medical Center, Cardiopulmonary Laboratory for the Aerospace Medical Research Laboratories under Contract ‡bAF 33(616)-8378.
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 7 ‡aPhysical education and training. ‡2fast ‡0(OCoLC)fst01062401
650 ⊔ 7 ‡aExercise ‡xPhysiological aspects. ‡2fast ‡0(OCoLC)fst00918004
650 ⊔ 7 ‡aAltitude, Influence of. ‡2fast ‡0(OCoLC)fst00806208
650 ⊔ 0 ‡aPhysical education and training.
650 ⊔ 0 ‡aExercise ‡xPhysiological aspects.
650 ⊔ 0 ‡aAltitude, Influence of.
700 1 ⊔ ‡aThompson, Leonard, ‡eauthor.
700 1 ⊔ ‡aShropshire, Spencer, ‡eauthor.
710 2 ⊔ ‡aAerospace Medical Research Laboratories (U.S.), ‡esponsor.
710 2 ⊔ ‡aIndiana University Medical Center, ‡esponsor.
730 0 ⊔ ‡aTechnical Report Archive & Image Library (TRAIL)
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