calories burned during 30 minutes hiit cardio

HRMs are worthless for HIIT. HRMs are only useful for steady state cardio.

Umm..I can't believe anyone hasn't chimed in on the most important part of this question:

weight/height of the person involved. It's nice to know (based on your profile) that you're 29/f...but actually calories burned vary a lot depending on the person's age, height, weight, body fat %...and something we can't define based on what you just told us: intensity of the activity. Yes you said HIIT...but the peaks of my HIIT will be different than the peaks of your HIIT, etc.

Although there are HIIT benefits during exercise, the big HIIT benefit is 'post burn'. It comes from pushing the SPO2 up and exercising in an anaerobic state. It is difficult to measure post burn caloric usage unless you have the right tools, but it is there (at least that is what the data points)

With a little research and educated assumptions you can formulate a HIIT that accounts for your the exercise and post burn. 13-20 kcal/min depending on weight is a good working range.

When it comes to fitbit and any activity trackers for that matter, you have to be mindful of the device limitations. Devices such as bodybugg that measure metrics such skin temp, conductivity, etc... are more useful at picking up non-motion caloric burn

HRMs aren't very accurate for HIIT, but you can try getting one and maybe under estimate?

I wouldn't listen to the Flex when it comes to calories burned during a workout like HIIT. It is just going off of your 'very active minutes' from steps. During a 30 minute HIIT workout, I usually would burn about 300-350 calories - 5'6", 150lb female. What you could do is take your heart rate at the beginning, during, and at the end of your workout. Take the average heart rate and plug it into this formula (0.4472 x H – 0.05741 x W + 0.074 x A – 20.4022) x T / 4.184 H is average heart rate, W is weight, A is age, and T is time. When I use this formula it is nearly spot on! All I would do is count my beats in my neck for 10 seconds and jot it down then multiply by 6 to get my bpm! The formula is for women. Men go to http://www.calories-calculator.net/Calories_Burned_By_Heart_Rate.html and use that. It gave me the same number as the formula when I did it for women.

leahhugh wrote: »

I wouldn't listen to the Flex when it comes to calories burned during a workout like HIIT. It is just going off of your 'very active minutes' from steps. During a 30 minute HIIT workout, I usually would burn about 300-350 calories - 5'6", 150lb female. What you could do is take your heart rate at the beginning, during, and at the end of your workout. Take the average heart rate and plug it into this formula (0.4472 x H – 0.05741 x W + 0.074 x A – 20.4022) x T / 4.184 H is average heart rate, W is weight, A is age, and T is time. When I use this formula it is nearly spot on! All I would do is count my beats in my neck for 10 seconds and jot it down then multiply by 6 to get my bpm! The formula is for women. Men go to http://www.calories-calculator.net/Calories_Burned_By_Heart_Rate.html and use that. It gave me the same number as the formula when I did it for women.

bumping to ask - is the bolded formula really right?? I did 40 minutes on a stationary cycle, averaging 139 bpm. The bike's sensors gave me 170 calories, while this formula gives me 347 - seriously?

This discussion is a few months old, I guess - found it in a search, sorry!

I just can't get over the difference between the burn estimates.