Cycling plus nonsense
Just read the 'Get faster at lunchtime article'. Apparently aerobic threshold is around 65% of max and after 5 mins of warmup you increase your heart rate from 40 to 80%. Clearly my heart beats like a frightened rabbit cos i'm at 40% putting my shoes on and 65% I'm barely out of the driveway. You should also do 4 sets of 3 mins at 90 to 100% which seems equally unlikely. I should have been prepared having just read in the same addition that on a fixie you'll be pedaling at well over 200 rpm on the decents :?