Most recent silat class, I apparently overworked my left sartorius muscle. For those of you anatomically-challenged, this is the longest muscle in the body, a skinny strap, originating at the anterior-superior iliac spine. This is at top of the leg. The muscle crosses to the medial side (inseam) and inserts on the upper tibia, via the pes anserinus, the co-joined tendon. The muscle aids in flexion, abduction, and lateral rotation of the hip, and flexing of the knee.
If you step on a piece of gum and it sticks to your shoe and you lift your foot to look at the sole? It helps with all those actions. We have a kick that looks kind of like that, a hacky-sack sort of motion, and we did a fair amount of those last session.
We worked legs pretty good overall, did a lot of kicking, twisting, sweeping, all like that.
Um. Anyway, I was sitting in my office chair, playing my guitar, knees bent, both feet flat on the floor when all of a sudden that sucker seized up and it did not want to let go. I managed to stand and stretch it out, but boy, howdy, was that a not-fun surprise.
Cramp! Cramp! Ah, shit–cramp!
All better now.
As one of my correspondents here has pointed out, it's hell getting old.
Still beats the option, though ...