Accelerations on the bike

Today I had an hour to ride so I tried to make some good use of it by doing a series of acceleration exercises: At every new mile, accelerate and stomp hard on one pedal and pull upwards hard on the other one for 25 repeats of each leg.

It ends up being a pretty good workout. I just would like to be able to maintain those 23-24 mph speeds I was seeing at the end of each acceleration! They don't show in the speed data, though, I guess I decelerated again too rapidly for anything to show up!