Join Date: Dec 2012
Location: new england
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Re: Why a racer for cruising discussion...
Paulo- On another thread I gently tried to point out I was concerned there may be health risks to this activity. There is an area of the brain called the supra chiasmic nucleus (SCN). It sets the circadian rhythm of your entire body. Both simple things like core body temperature, autonomic tone, hormone release and more complicated things like cognition and immune function. It in turn responds to "time givers" such as the tract (not involved in vision) which goes directly to this area from the retina. Activity and eating also feed into it. All cells ( even in bacteria or worms) have per and clock genes. The function of the SCN is to see all our cells are working in concert. If either by choice ( sailing) or demand (shift work or torture) the function of the SCN is disturbed there would seem to be a risk of significant health consequences ( such as the increased risk of cancer in shift workers). Interrupted sleep disturbs the circadian rhythm. The normal functions of sleep for the brain and body do not normally occur.Simply stated fragmented sleep is not of the same quality nor benefit as a normal sleep period inside a normal circadian rhythm. Again in my first post concerning this I expressed an concern that the repetitive disturbance of sleep associated with certain activities may have health effects. I'm unaware of literature concening sailing in this regard and would think an epidemiologic study to quantify the effects if any might be problematic. I'm aware of mechanisms to mitigate the short term effects of sleep disturbance and allow people to recognize these effects to ward against untoward behaviors as a consequence. But as a physician I think it would do the topic and the reader a disservice to engage in the activity you propose as it would give it short shrift and run the risk of not furthering health and well being. Hence, with all due respect decline your invitation
Last edited by outbound; 05-06-2013 at 11:56 PM.