Search Results

You are looking at 1-10 of 29

Fig. 3.; Linear regression plots for each GOR condition separately, both GOR conditions combined and ROR. All regression lines are significant to a value of P < 0.001.

Joseph Britton,

Desmond M. Connolly,

Danielle E. Hawarden,

Alec T. Stevenson,

Stephen D. R. Harridge,

Nicholas D. C. Green, and

Ross D. Pollock

Fig. 3.

Linear regression plots for each GOR condition separately, both GOR conditions combined and ROR. All regression lines are significant to a value of P < 0.001.

Fig. 2.; Mean (SD) +Gz reached at the endpoint provided by each test (GL and PLL) during the first gradual onset session (GOR-1) with anti-G suits deactivated (GOR-Off) and activated (GOR-On), and for rapid onset runs (ROR; anti-G suit activated). *Indicates significant (P < 0.001) difference between the level of +Gz at GL and PLL. †Indicates significant difference (P < 0.001) in the level of +Gz between GOR-Off and GOR-On conditions with the same endpoint.

Joseph Britton,

Desmond M. Connolly,

Danielle E. Hawarden,

Alec T. Stevenson,

Stephen D. R. Harridge,

Nicholas D. C. Green, and

Ross D. Pollock

Fig. 2.

Mean (SD) +G_z reached at the endpoint provided by each test (GL and PLL) during the first gradual onset session (GOR-1) with anti-G suits deactivated (GOR-Off) and activated (GOR-On), and for rapid onset runs (ROR; anti-G suit activated). *Indicates significant (P < 0.001) difference between the level of +G_z at GL and PLL. ^†Indicates significant difference (P < 0.001) in the level of +G_z between GOR-Off and GOR-On conditions with the same endpoint.

Heart Rate Variability as a Predictor of +G_z Tolerance During the High-G Selective Test

Nenad Bacevic,

Milica Ninkovic,

Milijana Drvendzija,

Jelena Vidakovic,

Marina Bacevic, and

Pavle Stepanic

Article Category: Research Article

Volume/Issue: Volume 95: Issue 2

Online Publication Date: Feb 01, 2024

DOI: 10.3357/AMHP.6319.2024

Page Range: 93 – 100

using HRV as a predictor of +G z tolerance, time-domain indices of HRV (SDNN, RMSSD) have been calculated for each candidate from the stored ECG recordings, and the results of the statistical analysis are presented herein. Candidates did not wear an anti-G suit or perform an anti-G straining maneuver. Candidates were subjected to centrifuge runs of +2 G z for 60 s (plateau), returned to 1 G, accelerated gradually to +5.5 G by a rate of 0.1 G · s −1 (gradual onset run: GOR), decelerated to 2 G, and then subjected to another plateau of +2 G for 60 s ( Fig. 1

Download PDF

Initial Investigation of a Grating Stimulus as a Visual Endpoint for Human Centrifuge Research

Joseph Britton,

Desmond M. Connolly,

Danielle E. Hawarden,

Alec T. Stevenson,

Stephen D. R. Harridge,

Nicholas D. C. Green, and

Ross D. Pollock

Article Category: Research Article

Volume/Issue: Volume 94: Issue 12

Online Publication Date: Dec 01, 2023

DOI: 10.3357/AMHP.6246.2023

Page Range: 894 – 901

. If, during the G warm-up runs, the subject was unable to identify the visual change, then a different parameter set was selected. The set used in each session was recorded. Procedure A total of six centrifuge sessions were completed over 3 d of testing. On two of the days, the first session consisted of gradual acceleration onset runs (GOR:1 and GOR:2). The remaining sessions consisted of rapid acceleration onset runs (ROR), each producing a single PLL and a single GL determination. Subjects remained relaxed throughout all centrifuge exposures but were

Download PDF