Tags

Type your tag names separated by a space and hit enter

Unpredictability of fighter pilots' g duration tolerance by anthropometric and physiological characteristics.
Aerosp Med Hum Perform. 2015 Apr; 86(4):397-401.AM

Abstract

BACKGROUND

While the factors affecting fighter pilots' G level tolerance have been widely accepted, the factors affecting fighter pilots' G duration tolerance have not been well understood.

METHODS

Thirty-eight subjects wearing anti-G suits were exposed to sustained high G forces using a centrifuge. The subjects exerted AGSM and decelerated the centrifuge when they reached the point of loss of peripheral vision. The G profile consisted of a +2.3 G onset rate, +7.3 G single plateau, and -1.6 G offset rate. Each subject's G tolerance time was recorded and the relationship between the tolerance time and the subject's anthropometric and physiological factors were analyzed.

RESULTS

The mean tolerance time of the 38 subjects was 31.6 s, and the min and max tolerance times were 20 s and 58 s, respectively. The correlation analysis indicated that none of the factors had statistically significant correlations with the subjects' G duration tolerance. Stepwise multiple regression analysis showed that G duration tolerance was not dependent on any personal factors of the subjects. After the values of personal factors were simplified into 0 or 1, the t-test analysis showed that subjects' heights were inversely correlated with G duration tolerance at a statistically significant level. However, a logistic regression analysis suggested that the effect of the height factor to a pilot's G duration tolerance was too weak to be used as a predictor of a pilot's G tolerance.

CONCLUSION

Fighter pilots' G duration tolerance could not be predicted by pilots' anthropometric and physiological factors.

Links

Publisher Full Text (DOI)

Authors

Park M
No affiliation info available
Yoo S
No affiliation info available
Seol H
No affiliation info available
Kim C
No affiliation info available
Hong Y
No affiliation info available

MeSH

AccelerationAdaptation, PhysiologicalAdultAerospace MedicineAnthropometryAviationCentrifugationDecelerationGravitationHumansMaleMilitary PersonnelProtective ClothingRepublic of KoreaTime Factors

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25945558

Citation

Park, Myunghwan, et al. "Unpredictability of Fighter Pilots' G Duration Tolerance By Anthropometric and Physiological Characteristics." Aerospace Medicine and Human Performance, vol. 86, no. 4, 2015, pp. 397-401.
Park M, Yoo S, Seol H, et al. Unpredictability of fighter pilots' g duration tolerance by anthropometric and physiological characteristics. Aerosp Med Hum Perform. 2015;86(4):397-401.
Park, M., Yoo, S., Seol, H., Kim, C., & Hong, Y. (2015). Unpredictability of fighter pilots' g duration tolerance by anthropometric and physiological characteristics. Aerospace Medicine and Human Performance, 86(4), 397-401. https://doi.org/10.3357/AMHP.4032.2015
Park M, et al. Unpredictability of Fighter Pilots' G Duration Tolerance By Anthropometric and Physiological Characteristics. Aerosp Med Hum Perform. 2015;86(4):397-401. PubMed PMID: 25945558.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Unpredictability of fighter pilots' g duration tolerance by anthropometric and physiological characteristics. AU - Park,Myunghwan, AU - Yoo,Seunghoon, AU - Seol,Hyeongju, AU - Kim,Cheonyoung, AU - Hong,Youngseok, PY - 2015/5/7/entrez PY - 2015/5/7/pubmed PY - 2015/6/10/medline SP - 397 EP - 401 JF - Aerospace medicine and human performance JO - Aerosp Med Hum Perform VL - 86 IS - 4 N2 - BACKGROUND: While the factors affecting fighter pilots' G level tolerance have been widely accepted, the factors affecting fighter pilots' G duration tolerance have not been well understood. METHODS: Thirty-eight subjects wearing anti-G suits were exposed to sustained high G forces using a centrifuge. The subjects exerted AGSM and decelerated the centrifuge when they reached the point of loss of peripheral vision. The G profile consisted of a +2.3 G onset rate, +7.3 G single plateau, and -1.6 G offset rate. Each subject's G tolerance time was recorded and the relationship between the tolerance time and the subject's anthropometric and physiological factors were analyzed. RESULTS: The mean tolerance time of the 38 subjects was 31.6 s, and the min and max tolerance times were 20 s and 58 s, respectively. The correlation analysis indicated that none of the factors had statistically significant correlations with the subjects' G duration tolerance. Stepwise multiple regression analysis showed that G duration tolerance was not dependent on any personal factors of the subjects. After the values of personal factors were simplified into 0 or 1, the t-test analysis showed that subjects' heights were inversely correlated with G duration tolerance at a statistically significant level. However, a logistic regression analysis suggested that the effect of the height factor to a pilot's G duration tolerance was too weak to be used as a predictor of a pilot's G tolerance. CONCLUSION: Fighter pilots' G duration tolerance could not be predicted by pilots' anthropometric and physiological factors. SN - 2375-6314 UR - https://www.unboundmedicine.com/medline/citation/25945558/Unpredictability_of_fighter_pilots'_g_duration_tolerance_by_anthropometric_and_physiological_characteristics_ DB - PRIME DP - Unbound Medicine ER -