Bone Warm Up: An Experiment

Warm up plays a role in fracture resistance. This will be quantified in coming posts. For now, I'll prove scientifically what I know intuitively which is that appropriate bone warm up is a (crucial) component of fracture resistance.
Please try an experiment:

Clap both your hands together very hard. Clap hard enough so that your palms slap together to create a concussive effect. You'll feel the shock of the impact as it goes up your wrist bones. Clap together about five times. Rest a bit. Repeat it. Rest. Repeat about five more times.

As your palms slam together, what do you feel in your wrist bones?

If you get the same sensations as when I try this, with the first few hits you feel shock and just a little bit of pain emanating to our wrist bones. If you continue to hit you'll also begin to feel fatigue in the wrist bones.
I was trying to feel in my wrists as I slammed whether the shock and pain of impact as I continued to hit would feel greater, lesser, or remain the same.
There were two questions:
1. How to evaluate during the 5 strikes.
2. How to evaluate from series to series of 5 strikes with the minute or so rest between.
Initially I felt about the same level of impact from start to finish of the 5 strikes though as noted I began to feel fatigue as I kept striking. Additionally, from series of 5 strikes to 5 strikes repeating this 4 or five times, the difference in force, impact, shock, schock absorption and pain seemed to me to be about the same. Perhaps in the last couple of series there was a slight sensation of reduction of impact, but, it was hard to tell.
HOWEVER, as I was driving along the freeway trying this, I rested for about five minutes after having done six or seven series of five strikes. After the five minute rest I tried three of four more series. Without question my wrist bones after the five minute rest were now much more girded against the force. After the five minute rest I felt hardly any pain, my wrists seemed to easily absorb the impact, and the shock of impact seemed much reduced. I also had the additional sensation that my wrist bones were now very strong and ready to take it on which is the opposite of the way they felt at the initial strikes.

Conclude: In the initial series of strikes with short rests between there was only minor improvement in bone "resistance" to the impact. But, after several series and then a five minute rest and then taking up another set of series, "resistance" was much increased from what it had been initially.

An explanation of this at the cellular level, next post.

Training:

Last night, farm breezes. Nob had about had it after one regular two mile gallop and 8 heats of 2f with gallop in, gallop out for each heat and initial warm ups. Complained that the fast stuff was hard on his legs, his back hurt from shoeing, and on and on, which speaks to Nob's horrible conditioning of late. I want 5 lbs. less of Nob by Saturday's breezes at Eureka. Art's training:
July 9 Mon: 6 x 3f snappy riderless with oldster. not much energy shown.
July 10 Tues: rest
July 11 Wed: 5 x 4f slow gallop riderless at his own speed. showing very little energy or desire to speed up.