Nit-Picks and Typos

In Sub-Threshold Variable Cadence 2x12, we are told at the very end of the first 12-minute block that the 50 rpm cadence will last until the end of the block.

That would be useful at the beginning of the 50 rpm stretch (around 10:00 into the block), not 5 seconds or so from the end.

Good spot! This has been updated