Last week I spent 40 minutes on my wooden horse, my longest session on it yet!
My setup is as follows:
I have a 30" tall sturdy sawhorse in my garage. I cut 45 degree angles on the long edge of a 2x4 so they meet at a 90 degree angle point. I drilled holes so this can be mounted on top of the sawhorse. When mounted, this makes the pointy edge 34 inches off the floor which forces me up on tiptoes. I cut two sheets of plywood to mount along the sides of the sawhorse, so my legs are forced outwards. In the bottom center of each side, there is an eyebolt. I use ankle cuffs with a rope tied to them, which I feed through the eyebolts and can walk myself onto the horse, pull the leg ropes and tie them together on the top of the horse. This forces my feet to remain close to the eyebolts, on tiptoe, with no way of raising either foot or walking off.
To secure my arms, I have two eyebolts in the ceiling (usually for storage purposes). Through one eyebolt, I pass a stocking with several ice cubes in the toe so it will not pass through the eyebolt until the ice has melted. This is my backup release, and I've run multiple tests with the ice to know how many cubes to last a little longer than my planned session. To the stocking, I tie a rope that then passes through the other eyebolt, and hangs down to about face height. I double the rope so the part hanging in front of me does not contain any knots for me to untie, they are all several feet away at the stocking. I feed the center of the rope through chains attached to wrist cuffs, and then hook a timer lock (reviewed at
viewtopic.php?f=12&t=12047) to the loop in the rope. With this setup, no matter how hard I pull on the wrist cuffs, I am pulling against the rope rather than the plastic lock. With my wrists secured in front of me at face level, there is no way that I can reach the rope securing my legs until either the time on the lock expires, or the ice melts.
When disassembled, all parts of my setup appear innocent enough with the exception of the wrist and ankle cuffs, which get hidden away. It only takes about 10 minutes to set up.
The longest I had previously gone was 30 minutes. I've found that between standing on toes and taking brief breaks sitting my complete weight on the horse, my calves can last about 20 minutes before I really start riding. Then the predicament begins between my sore legs and the soreness in my crotch. I was only going to increase my longest time by 5 minutes, but just before locking myself in I figured what the heck and set 40 minutes, and pressed the button. I was cursing myself the last 5 minutes, but when the time expired, I was able to release my wrists, untie my legs and crawl off the horse, I was really glad I had pushed myself!
My legs were sore for a couple of days following. It was a good reminder of my experience!
. Because of the blindfold kept going off line, and really hated the clover clamps by the end 
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