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Why 6 inch elevation?

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8 years 4 months ago #929 by Paul
Replied by Paul on topic Why 6 inch elevation?
Yes I suppose I mean elevation from zero to 6.875 inches at the tip. Whatever word I used I still mean I get a full incline at the tip of 6.875 inches, and by using the maths calculation I have stated if means at the tip there is a degree slope of 5.25 degrees because its the highest point, but further down that slope to where my head rests its 7 inches further down the hypotenuse or base of where the mattress would be, and is therefore lower down elevation at this point, and using the maths again here means the angle is lessened to 4 degrees.

I am not a mathematician and like I said before I had to learn this recently so I may be getting something wrong here. Andrew comes from an engineering background so maybe he can clarify.

Yes it appears most likely that IBT at much lower angles than 5 degrees optimum does indeed help, but I would rather have the 5 degrees than the 4 degrees that my head rests at to get maximum results.

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8 years 4 months ago #930 by Ozone
Replied by Ozone on topic Why 6 inch elevation?
You are forgetting to reduce the length of your bed by the distance you move down...the angle does not change. The whole bed is at the same angle. The 7 inches down from the top should be subtracted from the length...then when you recalculate the angle should be the same angle you got at the tip. Easier is just to download an inclinometer append use that...smart phones have MEMS in them and a magnetic compass so we can measure angles directly. Andrew will comment but the maths is straight forward.

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8 years 4 months ago #931 by Paul
Replied by Paul on topic Why 6 inch elevation?
No I took that into account. These are the measurements below with calculations and results are same as I said...
Tip = 6.875 inches elevation at 74.75 inches so 6.875 / 74.75 = 0.092 and inv Tan = 5.26 degrees slope.
7 inches below this is 4.75 inches height at the 67.75 inches mark = 4.75 / 67.75 = 0.07 = 4 degrees slope.
I don't have a modern mobile so I am unable to use any apps. What is wrong with the above figures ?
Need help on this one because I understand what you say that angle should never be different, yet these are clearly showing a difference in slope angle...confused.

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8 years 4 months ago - 8 years 4 months ago #932 by Paul
Replied by Paul on topic Why 6 inch elevation?
MY MISTAKE!

Okay its been revised. I used a figure of 4.75 instead of 6.75 but it still causes me problems. Please read.

These are the measurements below with calculations and results are...
Tip = 6.875 inches elevation at 74.75 inches so 6.875 / 74.75 = 0.092 and inv Tan = 5.26 degrees slope.
7 inches below this is 6.75 (incorrectly 4.75 in last post) inches height at the 67.75 inches mark = 6.75 / 67.75 = 0.0996 so using inverse tan = 5.69 degrees angle!

What is wrong with the above figures ? What am I doing wrong here ? The angle is now increasing lol.
I don't have a modern mobile so I am unable to use any apps.
Need help on this one because I understand what you say that angle should never be different, yet these are clearly showing a difference in slope angle...still confused.
Last edit: 8 years 4 months ago by Paul.

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8 years 4 months ago #933 by Ozone
Replied by Ozone on topic Why 6 inch elevation?
Glad to be of help....this might also help

myndwarp.wordpress.com/2009/03/10/egypti...nclined-bed-therepy/
The following user(s) said Thank You: Paul

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8 years 4 months ago #934 by Paul
Replied by Paul on topic Why 6 inch elevation?
Its not my maths that is wrong I think its my dodgy measurements that are wrong...Gonna get cuppa and re-evaluate lol.
That was a good link thanks for that.

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8 years 4 months ago #935 by Paul
Replied by Paul on topic Why 6 inch elevation?
Okay it was my measurements that were wrong. The way my bed is tilted with books its not been easy to measure correctly but now its final lol...
Will post measurements anyway just to be thorough...

Mattress and base length used = 74.75.

Top is raised by 6.5 inches, creating a 4.97 degrees angle (6.5 / 74.75 = 0.087 when inv tan = 4.97).
Where my head rests is 67.75 inches which is 7 below the top of mattress, which means 6 inches rise and creates a perfect 5.06 degree angle where head is...

So its only minor fluctuations in angle probably because of my imperfect measurements. So to cut all those previous posts of mine short its safe to say how far down the slope the head is placed is irrelevant, so long as you're not kissing your feet.

Finally, I have a 5 degree angle! Good enough for ancient Egyptians its good enough for me :D

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8 years 4 months ago #937 by Ozone
Replied by Ozone on topic Why 6 inch elevation?
There you go...bang on target. Now enjoy the most sophisticated anti aging technology that exists!

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8 years 4 months ago #941 by Andrew
Replied by Andrew on topic Why 6 inch elevation?
Add this app to your smart phone. play.google.com/store/apps/details?id=co...nometerFree&hl=en_GB

Right angle Triangle Calculator for Inclined Bed Therapy angle
The range that IBT works well with is around 5 degrees, though this is an approximation / round up.
www.csgnetwork.com/righttricalc.html
On a 2 meter bed for example we enter the height of the head end of the bed as 15 and the horizontal plane of the bed as 200 for metric measurements.

This gives an angle of 4.29
Raising the same bed by 20cm will give an angle of 5.71
Our bed measures 202 cm long, excluding upright head and foot-board. It is raised 17 cm higher at the head end than the foot end. Using the calculator provided it gives an angle of 4.81 degrees to the horizontal.

Gravity, Learn to live with it, because you can't live without it!

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