Cardiorespiratory assessment of 24-hour crash-diet effects on altitude, +Gz, and fatigue tolerances.

Lategola, Michael T.; Lyne, Peggy J.; Burr, Mary J.

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Cardiorespiratory assessment of 24-hour crash-diet effects on altitude, +Gz, and fatigue tolerances.

1981-02-01
By Lategola, Michael T. ; Lyne, Peggy J. ; Burr, Mary J.

File Language:

English

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Creators:

Lategola, Michael T. ; Lyne, Peggy J. ; Burr, Mary J.
Corporate Creators:

Civil Aeromedical Institute
Corporate Contributors:

United States. Office of Aviation Medicine
Subject/TRT Terms:
Publication/ Report Number:

FAA-AM-81-2 ; DOT/FAA/AM-81/2
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

OAM report.
Corporate Publisher:

Civil Aerospace Medical Institute
Abstract:

Eleven male surrogates of general aviation pilots, 25-40 years old, were tested for altitude, +Gz, and fatigue tolerances with and without previous fasting for 24 h. Testing included 2 min of lower body negative pressure (LBNP) at -40 torr (equivalent to +2Gz) after 118 min at 3,810 m chamber altitude and, after returning to ground level pressure, ergometry of 50 watts (W) for 6 min. ; The fast had no statistically significant effect on altitude and fatigue tolerances. One subject, who tolerated 2 min of LBNP in the nonfasting condition, lost useful consciousness during this test in the fasting condition. Although the remaining 10 subjects tolerated 2 min of LBNP in both fasting and nonfasting conditions without statistically significant differences in quantitated parameters, 2 of them during fasting manifested symptoms usually associated with impending syncope. Pilots should be informed that a 24-h fast may reduce the margin for safe tolerance of greater than or equal to +2Gz flight maneuvers.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/21181/dot_21181_DS1.pdf
File Type:

[PDF - 687.20 KB]
Collection(s):

FAA Civil Aerospace Medical Institute ; US Transportation Collection
Main Document Checksum:

urn:sha-512:5c4cd17b76b33cedde2ef6fc7c1f7a240bb457f7dc3afa7aa69b1bec08190c0353850e0fb34c5d4421a01f0f3308cb4d2c41bc1e55c644a11ad0f227765d6351

File Language:

English

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