Selecting exercise vs Auto detect

[KingG]

Hi,

I've found that the auto recognise function for exercises gives me completely different figures compared to me manually selecting the exercise before doing them.

I selected 'Bike' on my tracker before heading out to work and then I let my blaze auto detect my bike ride the next day on the same journey. I found that the calories were off by over 100. Selecting bike manually showed more calories burned than letting my tracker detect the exercise.

My question is, what is more accurate? Auto detect or manually selecting an excercise before starting.

[MakMak]

How did things like the duration and heart rate compare between the rides? That may be a factor in the difference.

[KingG]

Auto Detect:
17 mins
46 Calories Burned
91 Average BPM
6 min fat burn

Selected 'Bike' on tracker:
15:24 mins
117 Calories Burned
124 average BPM
15 minutes fat burn

[Rich_Laue]

Looking at the start times, which one was more accurate. I would think the manual startting would be.
I've been very surprised to see the auto exercise get my start time within a minute.

As for the different results between days, you might have been riding differently.

[MakMak]

I would second @Rich_Laue on that. My auto detect start time (and end time) is usually off for an exercise. As far as the calories burned, your heart rate is much higher for the shorter duration, which would account for the difference in calorie burn (you can see this if you look at the chart of calorie burn, too). I would suggest that either auto-detect or manual entry has the same accuracy for calorie burn, but manual start will better encompass the whole of your exercise period.

[StuMelb]

Well, atleast your unit has auto tracked a ride! On my first ride, I manually started it, but on the second ride (incidentally one of my best rides) I gave the auto tracking a go, and it did nothing! Just congratulated afterwards me for having climbed 75 floors! Grr!

Not sure where to go from there... reset watch beforehand?

Yes, I had outdoor bike riding auto tracker enabled, and still set on default 15min recognition time. Not feeling optimistic!

Stu.

[Rich_Laue]

While i understand auto tracking is a nice feature, i think of it as a backup to manually forgetting start a ride tracking. Especially when manual starting gives more accurate times,, and distance something gps is needed for. 

[FatNSlow]

The Auto-Detect is a rather annoying feature to me.  I rode my motorcycle to work today (26 miles) and the Blaze congratulated me on completing my marathon...  I would prefer the option to turn it off actually.

[MakMak]

@FatNSlow, you can select whether to auto-detect activities or not. Go into your profile, select settings, and then enter the "exercise goals." For each type of activity that it auto-detects, you can set a minimum duration and turn it off/on.

[FatNSlow]

Found it.  Good to know, thanks.