What does an extreme endurance runner carry in their grab bag? For many, the essential items include energy gels, blister bandages, extra socks and a GPS watch. But for Larry Grogin, a 71-year-old chiropractor and traditional Chinese medicine (TCM) practitioner from the US state of New Jersey, it was a selection of acupuncture needles and Chinese herbs. He would self-administer these nightly during his recent feat: running a marathon every day for 100 days to raise money for Parkinson’s...