Slow to fast

May 15, 2024

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Location:

Sandy,UT,

Member Since:

Sep 23, 2013

Gender:

Male

Goal Type:

Marathon Finish

Running Accomplishments:

5k: 18:34 American Fork 2014

Half Marathon: 1:30:30 Saltair 2013

Marathon: 3:44:22 St. George 2014

Long-Term Running Goals:

Continue running.

Personal:

I started running in April of 2013 and I think I'm addicted. I'm 37, married and I have 3 daughters.

Favorite Blogs:

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Miles:	This week:	0.00	Month:	0.00	Year:	0.00
Nike Air Pegasus+ 29 Lifetime Miles:						658.15
Altra Instinct 1.5 Lifetime Miles:						529.10
Saucony Kinvara 4 Lifetime Miles:						679.85
Saucony Peregrine 3 Lifetime Miles:						164.60
Saucony Type A5 Lifetime Miles:						310.35
Altra One2 Lifetime Miles:						233.10
Asics Cumulus 15 Lifetime Miles:						508.00
Saucony Ride 6 Lifetime Miles:						361.40
Brooks Ghost Lifetime Miles:						114.70
Kinvara 6 Lifetime Miles:						61.00
Mizuno Lifetime Miles:						4.90

Tue, Jan 21, 2014

Slow miles	Fast miles	Total Distance
4.00	3.00	7.00

I did a workout on the treadmill this morning. 2 x 1.5 miles with equal jog recovery.

Lap 1: 6:42 (watch), 6:18 (treadmill)
Lap 2: 6:55 (watch), 6:18 (treadmill)

I was a little surprized that there was such a difference between my watch and the treadmill. I'm positively sure the watch was least accurate of the two. I was really pushing hard and my effort felt more in the 6:20 min range. Most of my miles are slow miles so I guess I should expect the watch to be more accurate on the slow paces since it self calibrates when the GPS is being used. With less fast GPS and cadence data, there's not much data to correlate to. Inaccurate regression analysis.

Altra Instinct 1.5 Miles: 7.00

Comments

From Jake K on Tue, Jan 21, 2014 at 09:42:17 from 199.190.170.29

Interesting. Even if the treadmill is "wrong", you expect it to be consistent. That's a big gap between the watch and TM, though. The 620 uses some sort of footpod to measure cadence?

If you really want to geek out on this kind of stuff, check out www.dcrainmaker.com He has all kinds of cool little tests he does w/ GPS devices and product reviews.

From Andrea on Tue, Jan 21, 2014 at 10:23:57 from 72.37.171.52

Yeah, here is his review about the 620. He talks about how the internal accelerometer seems to do pretty well at an average pace run but falls apart once the speed increases significantly more than that. Interesting stuff.

http://www.dcrainmaker.com/2013/11/garmin-forerunner-review.html

Nice workout this morning!!

From Jake A on Tue, Jan 21, 2014 at 11:20:38 from 72.37.171.52

The other interesting thing is after I bumped up the speed on the treadmill for the interval, the watch initially reported a very slow pace and then started converging to a faster pace. It took longer to recognized that I was going faster.

The 620 uses an accelerometer in the watch itself.

That explains it Andrea, thanks. I'll check out that review.

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