Cycling in Waterloo Region

[jamincan]

It's not so much the speed that causes you to use slow-twitch muscles, it's that the load on your muscles is much less at a higher cadence (essentially you require less torque for the same speed), which means that you don't need to rely on anaerobic systems to provide the additional force needed at lower cadences. I'm probably screwing up the physiology somewhat, but the gist of it is that you should be able to sustain a higher load for longer at a higher cadence. This is within reason, of course, as most people have a much lower efficiency pedal stroke at very high cadences (>100 rpm).