Heart Rate Question (Fitbit HR/after workout burn)

ColePens · January 2015

Hey guys/gals,

I have a fitbit HR. I do Insanity Max 30. I stretch/warm up 5 minutes before and do the cool down/stretch. That's a total of about 35-40 minutes of work out. My fitbit HR is reading my HR in the workout mode for 1 hour and 15 minutes meaning the afterburn was there for a long time.

Is this a misread or is this how afterburn actually works? My resting HR is around 52-55 and it was saying i was around 90-110 during that cooldown.

Thank you for your help. I just want to better understand how my body is working here.

brianpperkins · January 2015

You've just noted why HRMs are so inaccurate. They cannot differentiate between your working out and resting time. All they do is plug your HR into a formula that assumes you're participating in a steady state cardio activity that it is programmed for. When you're not actively participating in that activity, they produce an inflated number.

editorgrrl · January 2015

MFP has a Fitbit Users group: http://community.myfitnesspal.com/en/group/1290-fitbit-users

The only way to prove or disprove the accuracy is to trust your Fitbit for several weeks, then reevaluate your progress. Your Fitbit burn is your TDEE (total daily energy expenditure). If you eat back your Fitbit adjustments for several weeks and lose weight, then it's accurate.

brianpperkins · January 2015

http://community.myfitnesspal.com/en/discussion/774337/how-to-test-hrm-for-how-accurate-calorie-burn-is/p1

http://community.myfitnesspal.com/en/discussion/773451/is-my-hrm-giving-me-incorrect-calorie-burn/p1

http://www.myfitnesspal.com/blog/Azdak/view/the-real-facts-about-hrms-and-calories-what-you-need-to-know-before-purchasing-an-hrm-or-using-one-21472

ColePens · January 2015

Thank you guys for this information. Bookmarked!

Heart Rate Question (Fitbit HR/after workout burn)

Replies

Categories