It's definitely aluminum and not dirt. It is only on the pedal contact spot. If it was dirt it would be that color other places too and it's not. I suspect sweat oxidizing the aluminum combined with the pressure to rub in off the pedal on/into the skin of my foot.
Yes, the whole exposure things seems most likely minimal, but I also know that my brain injury turns me into a canary in a coal mine in a lot of ways. Sardonic grin. With abandon, Patrick On Tuesday, September 15, 2015 at 2:12:35 PM UTC-6, Anton Tutter wrote: > > When your feet become dark grey after riding, I wonder how much of that is > aluminum oxide (dark gray/black) and how much is dirt. If you rode on > plastic pedals would your feet still get the same dark gray? > > It would be interesting to know if metalworkers who work with aluminum > develop any neurological problems as a result of handling aluminum year > after year. I know that whenever I work with aluminum fenders, my hands get > black with aluminum oxide. I'm guessing that the absorbtion ends up being > very low, perhaps less than normal diet, but who really knows? > > Anton, who works in biology and has fun with aluminum > > > > On Tuesday, September 15, 2015 at 3:13:21 PM UTC-4, Deacon Patrick wrote: >> >> Anton, thank you. Yes, the anti-persperant was one of my questions. After >> a ride, my forefeet are a dark grey and the aluminum pedals are definately >> rubbed smoother on the barefoot side vs. the spiked side. The logic of it >> seems to point to it not being an issue, but the price of it being an issue >> is more extreme. >> >> For those responding about the other dangers of going barefoot -- thank >> you for your concern! In the years I've gone barefoot the concerns listed >> are non-factors with the exception of chemical or parasite exposure. >> Chemical because way too much gets sprayed with all kinds of junk, and >> parasite could potentially be an issue in a different geographic area. Of >> course, the intent of this thread was not to be a critique of going >> barefoot. Grin. >> >> With abandon, >> Patrick >> >> On Tuesday, September 15, 2015 at 11:53:47 AM UTC-6, Deacon Patrick wrote: >>> >>> Anyone know about if the skin (specifically soles of the feet) can >>> absorb aluminum via riding barefoot? >>> >>> Here’s what prompts the bizarre question: I’ve lost much of my summer to >>> many “hard” brain days, including increased brain fog and new symptoms of >>> mini-charlie-horses in the muscles near my bones as well as significant >>> muscle twitching. At the recommendation of an herbalist who though I may >>> have metal toxicity from my surgery last year, I began taking volcano dirt >>> and have since begun doing better than I have since early spring. I’ve >>> shifted to always wearing shoes when riding so I don’t risk messing things >>> up, but there is a whole lot of corollary and very difficult to determine >>> causal with all this (as is always the case). Hence, my question. Not >>> meaning to delve into if/to what extent this is all whacky. Please respond >>> off list if you feel inclined. Grin. I’m just wondering what the collective >>> knowledge of this august body knows about the intersection of biology and >>> metallurgy. Grin. >>> >>> With abandon, >>> Patrick >>> >>> *www.MindYourHeadCoop.org <http://www.MindYourHeadCoop.org>* >>> *www.OurHolyConception.org <http://www.OurHolyConception.org>* >>> >>> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.