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<blockquote data-quote="dcollins" data-source="post: 186790" data-attributes="member: 876">As I implied in my first post, and others have mentioned, that's not nearly the case for people performing violent activity and under a great deal of stress. The standard durations might be realistic for a relaxed and ready breath-holder, but not for the average &quot;encounter&quot; situation.Edit: On researching what I could, even 2 minutes is apparently very long.(1) Here's a site pointing out that &quot;normal&quot; capacity for sounding an &quot;SSS&quot;-sound test, as an adult male, stands at about 20 seconds -- <a href="http://www.unc.edu/~chooper/classes/voice/webtherapy/breathsupport.html" target="_blank">http://www.unc.edu/~chooper/classes/voice/webtherapy/breathsupport.html</a>(2) A scuba site suggesting that a normal dive for a trained diver is about a minute-and-a-half, and that &quot;Every action must have a reason or it will waste precious oxygen. Remember that all body movements require oxygen and that thigh muscles are one of the largest, therefore requiring more oxygen than most other muscles... Excessive exercise at depth, such as struggling with a fish or fighting a strong current, can be deadly to the freediver as Terry Maas points out in his book, Bluewater Hunting and Freediving....&quot; -- <a href="http://www.ymcascuba.org/ymcascub/currnt33.html" target="_blank">http://www.ymcascuba.org/ymcascub/currnt33.html</a>(3) Here's a site pointing out that record competitive breath-hold dives are timed at about 2 minutes (even if the diver can &quot;relaxed&quot; hold their breath for around 4 minutes): &quot;She set her second record in 1 minute 58 seconds, although she has accomplished this dive in as long as 2 minutes 7 seconds.&quot; -- <a href="http://www.oar.noaa.gov/spotlite/archive/spot_diving.html" target="_blank">http://www.oar.noaa.gov/spotlite/archive/spot_diving.html</a></blockquote>

[QUOTE="dcollins, post: 186790, member: 876"] As I implied in my first post, and others have mentioned, that's not nearly the case for people performing violent activity and under a great deal of stress. The standard durations might be realistic for a relaxed and ready breath-holder, but not for the average "encounter" situation. Edit: On researching what I could, even 2 minutes is apparently very long. (1) Here's a site pointing out that "normal" capacity for sounding an "SSS"-sound test, as an adult male, stands at about 20 seconds -- [url]http://www.unc.edu/~chooper/classes/voice/webtherapy/breathsupport.html[/url] (2) A scuba site suggesting that a normal dive for a trained diver is about a minute-and-a-half, and that "Every action must have a reason or it will waste precious oxygen. Remember that all body movements require oxygen and that thigh muscles are one of the largest, therefore requiring more oxygen than most other muscles... Excessive exercise at depth, such as struggling with a fish or fighting a strong current, can be deadly to the freediver as Terry Maas points out in his book, [i]Bluewater Hunting and Freediving[/i]...." -- [url]http://www.ymcascuba.org/ymcascub/currnt33.html[/url] (3) Here's a site pointing out that record competitive breath-hold dives are timed at about 2 minutes (even if the diver can "relaxed" hold their breath for around 4 minutes): "She set her second record in 1 minute 58 seconds, although she has accomplished this dive in as long as 2 minutes 7 seconds." -- [url]http://www.oar.noaa.gov/spotlite/archive/spot_diving.html[/url] [/QUOTE]

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