Consistent issue with HR spiking after approx 7 to 10 minutes on 935

My very fit and competitive 12-year old runner experiences a consistent issue where her Garmin 935's HR data show a dramatic bump up at around 7 to 10 minutes into what is an otherwise easy (5/10 effort) long run, and then stays high. It does not correspond to her perceived effort at all. Any ideas? This is happening both when worn by itself as well as when using a chest strap.

At the same time, the Performance data doesn't kick in until right after this big bump. Is that by design? 

Parents
  • Well, at first I thought it's due to reading of WHR. But when I read about it happens with chest strap too I was a bit concerned. What's her real heart rate at these situations measured at carotid? Does it drop when she stops? Maybe check with a cardiologist! Just because nothing serious is know doesn't mean it exists.

    Concerning performance data: this is normal. It needs a certain HR level to become active. You'll find something more in detail here in forum and/or on Forstbeat web site.

Reply
  • Well, at first I thought it's due to reading of WHR. But when I read about it happens with chest strap too I was a bit concerned. What's her real heart rate at these situations measured at carotid? Does it drop when she stops? Maybe check with a cardiologist! Just because nothing serious is know doesn't mean it exists.

    Concerning performance data: this is normal. It needs a certain HR level to become active. You'll find something more in detail here in forum and/or on Forstbeat web site.

Children