Being back at 2g of vitamin C every morning, as well as slowing down the cadence made a slight improvement. It became possible to run every day at 11min/mile & slower without cumulative tendinitis. It wasn't a slam dunk. 9 minute miles & 180 steps/minute seem to be permanently out of reach. The pungent smell of soy beans returned. Spring valley tablets are made in China, probably from soy beans. Fortunately, the summer heat makes higher speeds impractical regardless of age. The philosophy was to try to get supercompensation from speed work, but after 6 months of various speeds & number of intervals, every combination only reduced speeds in the long term. Lions may have run their last 6 minute pace. There definitely needs to be an extended time before the next race in which no intervals will be run. Effects of aging were most unexpected. Instead of muscle atrophy, heart attacks, or arthritis, the problem ...