Least exhausting size of boat to cruise?

[Jim_ME]

I came upon this thread and an interesting discussion of the motion comfort of various designs...

http://www.boatdesign.net/forums/archive/t-20655.html

Including a list of boat designs and their Motion Comfort Ratio (similar to the Capsize Screening Ratios that John has posted) as one method to try to quantify (and compare) this characteristic.

Excerpt from that thread: "Motion Comfort Ratio was developed by Boat Designer Ted Brewer. The formula predicts the speed of the upward and downward motion of the boat as it encounters waves and swells. The faster the motion the more uncomfortable the passengers. Thus, the formula predicts the overall comfort of a boat when it is underway. Higher values denote a more comfortable ride. As the Displacement increases the motion comfort ratio will increase. As the length and beam increases [for a given displacement, I believe he means] the motion comfort ratio will decrease." - Antonio Alcal

[SeaHusky]

RossD, welcome and thanks for your post!
It is informative and does give some hope. Sorry to here about your condition(s) but I'm glad it doesn't stop you.
(ME/CFS is what I have so for me it's more of a fatigue issue than limited mobility.)
Thanks to the rest of you also.
The Motion Comfort ratio is interesting although I find it difficult to relate it to anything familiar.
What I was going for in my original post was (is) if there is a meaningful way to measure the fatigue caused by discomfort as opposed to fatigue due to handling big sails and a heavy boat but maybe this is not possible, or perhaps the line goes somewhere at 25-30 feet?
In some other post I read that the effort for sailhandling doubles when OAL goes from 30 to 35 feet...
Also the comment about IOR-based boats may relate to a statement by Alberg I read somewhere where he said that he designed his boats to sail well without six gorillas hanging over the side .   

[Auspicious]

I just got home from a 13-day light-air cold-weather delivery of a Swan 47 from Oxford MD to Virgin Gorda, BVI. I'm exhausted and my back is killing me. That boat is the least comfortable craft I have ever sailed. There is quite literally nowhere to sit that is comfortable.

The experience caused me to reflect on John's early point of comfort=rest. This is nothing to do with boat size and everything to do with ergonomics. I consider myself quite fortunate to have a boat with many comfortable places to sit.

Now where did I put that heating pad?