070108 Monday – Welcome to the Inferno
No – it isn’t that cold. Craig is just on fire.
Workout (from the CrossFit Mainpage WOD):
Complete as many rounds in 20 minutes as you can of:
65 pound Thruster, 12 reps
Post rounds completed to comments.
“Human muscles are made of four main types of fibre, including two ‘slow-twitch’ varieties and one ‘fast-twitch’ muscle type that are suited to endurance and sprint activities respectively. Little has been known about the fourth type, called IIX fibre, because it is scattered throughout different muscles . . .”
“. . .Type IIX fibres are somewhere in between: they have lots of mitochondria but also contract quickly. One idea is that fibres go through a stage of being IIX during a conversion from fast-twitch to slow-twitch types, and that this might happen during certain forms of training. But their function is not known for certain . . .”