Just so I'm not always all about hiking....
I did my first official Training-For-Austin workout today.
10-min jog warmup, then 6 X 400, supposed to be at 2:15 but my natural "try for 2:15" pace kept me coming in around 2:04. I carried the GPS a few laps to keep it around 6.7 mph (I'd done the math, that's what 2:15 worked out to) but whenever I didn't carry it I went faster.
2-min rest intervals during which I stretched calves and hamstrings and walked around. Iced my Achilles's afterwards. They didn't hurt much running, and don't now. I did shorten my planned 4-lap jog cooldown to one lap plus a one-lap walk, just to be safe on the Achilles.
Tomorrow is a bike day, Friday rest, then Saturday long run, 7 miles according to my training plan. This will seem easy, since I've already got 6 10-milers in the bank in the last month.
On what are supposed to be "easy running/jogging" days, I'm substituting biking to save wear and tear on my chronically-ailing Achilles.
We shall see what happens at Austin. If my old decrepit body makes it through the training.