October 20th, 2008


Nike+ Observations

A disappointing problem with the Nike+ system is that the device is not consistent when measuring distance. I run the same route every day. I measured the route quite precisely using my bicycle odometer: it is a shade longer than 6.2 miles, enough to ensure a 10 kilometer route. The Nike+ system, which is based on an accelerometer which fits in the runner's shoe, clocks this route at anywhere from 5.9 to 6.5 miles.

I suppose that makes the system about 90% accurate, and for a non-competitive slug like me perhaps absolute accuracy is not essential. Still, today I was disappointed when the Nike+ announced the end of my run was 5.99 miles in a time of 1:02, with an average mile pace of 10:29. In reality, at 1:02 for 6.2 miles I achieved very close to a ten-minute mile average pace, which is my current goal.

From what I have observed, the Nike+ records distances as being shorter when the running pace is consistent, and longer when the pace varies throughout the workout.

No NaNo?

Guess what? Relatives will be coming to visit from 28 October thru 10 November.

This will inhibit my ability to participate in NaNoWriMo.

Or at least it will give me an excuse for failing yet again.