Ever run into this? Usually my garmin measures short, but noticed doing short repeats with garmin set to alert, ran into this. Seemed way to long according to usual effort on track.
Thank you.
Ever run into this? Usually my garmin measures short, but noticed doing short repeats with garmin set to alert, ran into this. Seemed way to long according to usual effort on track.
Thank you.
Get a cheap Timex watch and do timed efforts instead.
Don't use GPS to measure repeats, one way or another it'll be wrong. Not so wrong that you'll hurt your training, but wrong enough to be annoying.
Either use timed efforts or use the GPS to measure the first (or use GPS to measure a route / points on a route) and then run the repeats on the same route for consistency / repeatability. And then use that same route again and again when you're doing repeats so you can measure progress / consistency etc.
If you really want accurate distance / time / pace data, use a measured track. Otherwise 10-20m inaccuracy in the GPS measurements could give you pace which is unhelpful.
e.g. 1 track mile measured as 1630m by watch in 6min00s = 6m05 pace. (i.e. watch measures long)
e.g. 1 mile measured as 1590m in 6min00s = 5m56 pace. (i.e. watch measures short)
OK, not the end of the world, but if both of those were the results on my GPS watch after running 1609m on a track I'd know I'd been consistent, even if the pace I stuck on strava showed 9s per mile difference.
I'm okay with GPS for repeats if they're as long as a mile and if I know I'm in an area that gets great GPS reception (no tall buildings). Still the track is the way to go. If you really like doing repeats on roads, get yourself a wheel and some spray paint, and mark it off in the very early morning.
GPS units are not measuring devices.
£££££ wrote:
Get a cheap Timex watch and do timed efforts instead.
THIS^