I found the little teeny parcourse in a school near my house (off Alcatraz in Oakland). Those who went outdoors in the 70s will likely remember this phenomenon--various exercises set up in an area where you can also run outdoors. It's brilliant and I have no idea why they fell out of favor--I assume just that there's no profit model, it's something a city installs for the good of its citizens, and we know how popular that is these days.

So now I'm hooked. I discovered that there's another, much more extensive one alone the Ohlone Greenway in Berkeley this weekend. Does anyone know where there might be others? Funny thing, but pushups, chin-ups, jumping jacks and the like are actually (gasp!) harder work than the machines at the gym. Almost like those drill sergeants were onto something . .