Weakness Leaving the body

Ancient Singlespeedist Proverb: "Pain is just weakness leaving the body." Yipes. After only riding the singlespeed at a slow pace with low gearing and fat tires, I swapped in the skinnier 'cross tires and upped the gearing to (a still quite low) 38x16 and headed out to work yesterday morning. Ouch, haven't hurt like that in a while. Its taken me a few rides to get back in the groove - the mind set of "all you need is one" does not come on instantly. Rather it works its way into you - like a saddle sore, but in a good way. Unlike a saddlesore, riding a singlespeed makes you climb like jet stink (fixed is even better). Hate hills? Try a 1x1. You'll hate them on a new level, but it will work to your advantage.
What does this have to do with triathlon? Dunno, but I gotta get back to work.