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Heart Rate Spike Question

kjc777kjc777
in General Training Discussions

Hi Coach(es),  just wondering why my heart rate spiked up to 192 yesterday warming up for my 3x1mile run workout. I ran really slow but it flew up there and took a while to come down.  I did my workout and was back to around 153/Z4 avg and felt good.  Ran all of the intervals at 8:30 or less.

Here is my garmin record:  http://connect.garmin.com/activity/298666125

No big deal  here but i was curious.  I thought I was rested since this was the only workout of the day for me and the day before was just an easy hour swim, although I did do a bunch of house/yard work before that.  Maybe it was all that dusting and scrubbing  

Hope this is the right place to post this.

Thanks

 

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