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Given how we have out breaks after out breaks of many previously conquered deceases, CDC today has no credibility in my mind.
Are you blaming the CDC for the idiot parents that don't vaccinate their children?
Whether parent blindly vaccinate their children (or not) is not the issue. I am blaming the CDC for the incompetence. They have a
marketing guy as their head since the first case of Ebola in the USA. Even TB is back. All these diseases that we have vanquished from our soil for decades are now back in the USA, and just down the road in a neighborhood near you in the USA. With such track record of success, whatever they say deserves extra scrutiny and doubt.
This is an interesting discussion. I was barely able to write after my gym session today. Recovered within a couple of hours though. The point of strength training is to "exhaust" your muscles and create minor tearing within the muscles causing the muscles to rebuild and adapt to the higher work load...
I have also learned (from a TV documentary) that the bone is built up by small damages and the bodies' reaction. The repair and calcium build up is what make the bone stronger. Not being a biologist myself, I cannot attest to how true that is.
The friend I was talking about in the last reply - hitting phone books and hot sand all day. Him being my buddy and his father running a "kung fu" school, I was trying to learn some "kung fu" stuff from him for free. So, I was "taught": the purpose of such hitting is to desensitize yourself to the pain as well as building up strength; harden your skin, dampens your nerve, so forth. All in the expectation that "the pain is all on the opponent's end" when it counts.
I am sure hitting the phone book causes some damage - otherwise it wont hurt so much when I tried.
So, for these kind of heavy-duty stuff (not just weight lifting), my logic is, it follows that if your skin and out layer of flesh is harden to the point where pain is hardly felt, it could hardly be helpful with dexterity.
Side note: I found it funny when watching "kung fu" movies with girls having beautiful hands -- The "kung fu" people I've met, the calluses on their hands are so thick it almost looks like quarter-inch pads around the knunkles. I won't hold that pair of hands (however beautiful her face) except if I am wearing leather work gloves.