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Complete Normal Body Oxygen Index Table (Breath Holding Time)

Here is a more detailed Table of Table 4 from the web page Normal Body Oxygen Index - Control Pause in Healthy People

Abbreviations for the Table: "max" - maximum; "norm" - normal; "out" - outhale or exhalation; "in" - "inhalation"; "tr" - trained; "imm." - face immersed in water. In their medical and physiological research articles, the breath holding time test was done after some breathing maneuvers (maximum inhalation, or 3 deep breaths, etc.). The explanation for corresponding CP (Control Pause, or body oxygen level, or body oxygen level, or BHT) calculations are given below.

Table 4b. Complete Normal Body Oxygen Index Table

Types of people
investigated
# of
subj.
CP,
s
BHT,
s
Conditions (order
of actions
before BHT test)
% of
BHT
for CP*
Reference
US aviators 319 41 s 68 s Max out, large in 60% Schneider, 1919
Fit instructors 22 46 s 67 s Max out, norm in 70% Flack, 1920
Defence pilots 24 49 s 72 s Max out, norm in 70% Flack, 1920
British candidates 23 47 s 69 s Max out, norm in 70% Flack, 1920
US candidates 7 45 s 66 s Max out, norm in 70% Flack, 1920
Delivery pilots 27 39 s 57 s Max out, norm in 70% Flack, 1920
Pilots - scouts 15 42 s 62 s Max out, norm in 70% Flack, 1920
Min requir.:flying 34 s 49 s Max out, norm in 70% Flack, 1920
Normal subjects 20 39 s 65 s Max out, large in 60% Schneider, 1930
Normal subjects 30 23 s 58 s Max in 40% Friedman, 1945
Normal subjects 7 44 s 115 s Max out, max in 38% Ferris et al, 1946
Normal subjects 22 33 s 45 s Norm in 73% Mirsky et al, 1946
Aviation students 48 36 s 90 s Max in 40% Karpovich, 1947
Normal subjects 80 28 s 70 s Max in 40% Rodbard, 1947
Normal subjects 3 41 s 82 s Norm out, tr. 50% Stroud, 1959
Normal subjects 16 16 s 48 s Max: in, out, in 33.3% Kohn .., 1970
Normal subjects 6 28 s 76 s Max out, max in 38 % Davidson .., 1974
Normal subjects 16 22 s 56 s Max in 40 % Stanley et al, 1975
Normal subjects 7 29 s 77 s Max out, max in 38 % Gross et al, 1976
Normal subjects 6 36 s 36 s Norm out 100% Bartlett, 1977
Normal subjects 9 33 s 55 s Norm out, tr. 60% Mukhtar et al, 1986
Normal subjects 20 36 s 60 s Norm out, tr. 60% Morrissey et al, 1987
Normal subjects 14 25 s 74 s Deep breath 50%O2 33.3% Zandbergen .., 1992
Normal subjects 26 21 s 21 s Norm out 100% Asmudson .., 1994
Normal subjects 30 36 s 36 s Norm out 100% Taskar et al, 1995
Normal subjects 76 25 s 67 s Max out, max in 38% McNally & Eke, 1996
Normal subjects 8 32 s 35 s Norm out, tr. 90% Sasse et al, 1996
Normal subjects 10 38 s 38 s Norm out 100% Flume et al, 1996
Normal subjects 31 29 s 32 s Norm out, supine 90% Marks et al, 1997
Normal males 36 29 s 29 s Norm out 100% Joshi et al, 1998
Normal females 33 23 s 23 s Norm out 100% Joshi et al, 1998
Healthy subjects 20 38 s 108 s Max in, tr. 35% Morooka et al, 2000
Normal subjects 6 30 s 60 s Usual exhale, tr. 50% Bosco et al, 2004
Normal subjects 19 30 s 33 s Usual exhale, tr. 90% Mitrouska .., 2007
Healthy subjects 14 34 s 114 s Max out-in, imm., tr. 30% Andersson .., 2009

Notes. * “Handbook of physiology”, after analysing numerous relevant publications, suggested the following proportions for BHT measurements (Mithoefer, 1965). If BHT after full inhalation is 100%; then BHT after normal inhalation is 55%; BHT after normal exhalation is 40%; BHT after full exhalation is 24%. Taking an additional full exhalation or inhalation before starting the test increases BHT by about 5 or 15% respectively for each manoeuvre. Subjects, who have repetitive breath holds in a day, experience the “training” effect that gradually increases maximum breath holding time (up to 30%), but the BHT test done until first stress or initial discomfort is not improved using such training. This information allows us to compare different BHT tests done during almost a century of clinical investigations, if we use some standard conditions for the test. In order to do that, let me introduce the CP (Control Pause): the CP is BHT after quiet or usual expiration and only until first sensation of air-hunger (a stress-free version of the test). For people who practiced breath holding many times per day, BHT for as long as possible after usual exhalation is about 2 times longer then the CP due to the “training effect”. For naive people, it is only about 30% greater.
**. Zandbergen et al, 1992 conducted their experiments with the mixture of 50% O2 and 50% N2. According to Ferris with his colleagues (1945), such mixture increases normal BHT by about 50%.

References for Table Normal Breath Holding Time - Control Pause in Healthy People

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