1,910 reputation
111
bio website bankuei.wordpress.com
location Oakland
age 36
visits member for 10 months
seen 2 hours ago

Just spent 2013 recovering from cancer and am now getting back into gaming. I grew up self-teaching out of the Red Box D&D, moved onto other systems from there, and got deep into indie RPGs with funky rules like letting players take narration or having GM-less systems, etc.

I mostly love rpgs that are either narrativist and drama focused, and/or tactically fun. Including games that do both.


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comment Reducing Soreness?
Yes, I'm trying to give people a layman's version. Here's the gross effect: gustrength.com/muscles:adaptive-shortening and here's a good video on the science side of what I was explaining youtube.com/watch?v=obM1uHucAbM (I have to remember more and more info is showing up on youtube these days...)
2d
comment Reducing Soreness?
Finally found a decent layman's book: books.google.com/… Pg. 176 goes into muscle spindle adaptation to length , pg. 178-9 under Tendon Organ talks about the adaptation of the joint receptors. "...the activity of the muscle spindle depends on the muscle length and not the tension" - aka it measures rate of change in length, regardless of whether the muscle is active, or in a resting state. Too fast of a change from the expected position, stretch reflex is activated.
2d
comment Reducing Soreness?
If you want the exact chemical reactions along the spindle pathways and how that affects calcium resistance etc. you'll have to do the work yourself. I studied up to the level of functionality for sports therapy not for the level of cellular medicine.
2d
comment Reducing Soreness?
And, of specific interest to martial arts is that this is the neurology that allows for the trick where you pull/push in one direction then quickly go in the other direction and a person is unable to change force quick enough - the reciprocal inhibition created by those same muscle spindles makes it impossible physiologically to 'turn on' those same muscles. This happens at the spinal column so there's no conscious choice in the matter. en.wikipedia.org/wiki/Reciprocal_inhibition
2d
comment Reducing Soreness?
A rate of change to a certain level produces the "braking action" I've noted: "The reflexly evoked activity in the alpha motoneurons is then transmitted via their efferent axons to the extrafusal fibers of the muscle, which generate force and thereby resist the stretch. " and above that, when it finally goes beyond that, produces the clasp knife response of a complete deactivation of the muscles: en.wikipedia.org/wiki/Clasp-knife_response The former produces muscle tears, the latter complete destabilization.
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comment Reducing Soreness?
The second example in the picture, is effectively where the fibers return to after a muscle is left in a given state long enough - the afferent firing signals go to "this is neutral" rather than high or low. In kinesiology and much of PT this is used to help get lasting posture changes usually with around 30 second holds to reset the spindle rates.
2d
comment Reducing Soreness?
Sensory fibers in the muscle spindles measure the rate of change in muscle length - to do so, they themselves have a minor amount of contraction in order to have tension to measure that difference. When you leave muscles at a resting state, these fibers will shorten to take that as the "normal" length and fire signals when the rate changes quickly. en.wikipedia.org/wiki/Muscle_spindle#Sensitivity_modification Also note this: en.wikipedia.org/wiki/Muscle_spindle#mediaviewer/…
Nov
19
comment Risk of brain damage in casual/moderate Muay Thai sparring
I wrote this answer about head hits earlier this year, also from someone asking about kickboxing. Let me know if this answers your question: martialarts.stackexchange.com/questions/998/…
Nov
19
revised Reducing Soreness?
corrected a couple of typos, added a few words to clarify a sentence.
Nov
19
answered Reducing Soreness?
Nov
18
answered Training martial arts in china
Nov
12
revised Frequent ribcage injuries, is this normal?
Advised to remove chiros and clarify: extensive details added.
Nov
12
comment Frequent ribcage injuries, is this normal?
Thanks for clarifying. I'll remove chiros and include some better details in my answer.
Nov
12
comment Frequent ribcage injuries, is this normal?
There's chiropractors who claim to fix organ damage and require people to get adjustments every week - sure, that's a quack. There's also chiros who basically focus on minor resets of bones followed by PT to strengthen your muscles to keep things in place. Mostly, GP doctors don't have a lot of training in muscle/bone issues. Bruising pain doesn't last a month and onward. OP needs to find someone who does have some related skill and can figure out the real problem.
Nov
11
answered Frequent ribcage injuries, is this normal?
Nov
10
answered Should I stay in a Muay Thai gym where the fighters hit without much restraint or consideration?
Nov
6
comment Has anyone collected an openlist of “best practices/lessons learned” for seminars
I really hope you find a way to make this a question good for this site, it's actually a useful thing to cover.
Nov
5
answered What is Qi power and has it been proven to exist scientifically?
Oct
30
comment Why Do Pressure Points Work Differently Against Different People?
When you're still an embryo, your testicles descend through a channel in the abdomen. It's supposed to close up, though it can re-open later and give you a hernia of the groin. Intense muscle training allows you to re-open it and pull the testicles back up into the channel. I would not say it's a great trick to develop for combat or the safety of avoiding hernias, but hey, it can be done.
Oct
21
awarded  Necromancer