What Should My Heart Rate Be To Burn Max. Fat?

After doing HIIT on the eliptical machine, and a few minutes after my cool down, I measured my heart rate and it was 140.

Man was HIIT a workout! I burned 440 cals in 20 min. when it usually takes me an hour to do burn the same amount by doing moderate even-paced cardio on the same machine.

So yea, my question is: 1) what should my heart rate be to burn maximum fat? 2) During the 'hard' part of a HIIT workout, what should my heart rate be climbing up to? What does yours go up to?

I am 19 years old, 5'3 and 140 lbs by the way. Looking to lose 20 lbs. Thanks everyone.

I'm sure some of the experts will respond, but if your HR was only 140 that doesn't sound like HIIT. My HR is around 145-150 with my regular cardio. When I do HIIT it hits 170-175 at the height of an interval. Also, how are you measuring your HR & calorie burn? Are you wearing a HR monitor or using the elliptical machine? If you're using the elliptial HR grips you should be forewarned that those are HIGHLY inaccurate.

[QUOTE=kdot28;468111741]After doing HIIT on the eliptical machine, and a few minutes after my cool down, I measured my heart rate and it was 140.

Man was HIIT a workout! I burned 440 cals in 20 min. when it usually takes me an hour to do burn the same amount by doing moderate even-paced cardio on the same machine.

So yea, my question is: 1) what should my heart rate be to burn maximum fat? 2) During the 'hard' part of a HIIT workout, what should my heart rate be climbing up to? What does yours go up to?

I am 19 years old, 5'3 and 140 lbs by the way. Looking to lose 20 lbs. Thanks everyone.[/QUOTE]

You should be in an anaerobic range at the high intensity part of your workout if you're doing HIIT.

Mine goes from 140-150 in the low range to 175-180 at the hardest part.

If you're 140 after you've cooled off for a few minutes, that's okay, you're still burning from the workout. But I like to cooldown to 100-120 before stopping my workout.

There is a calculator you can use at

freedieting.com/tools/target_heart_rate.htm

[QUOTE=kdot28;468111741]After doing HIIT on the eliptical machine, and a few minutes after my cool down, I measured my heart rate and it was 140.

Man was HIIT a workout! I burned 440 cals in 20 min. when it usually takes me an hour to do burn the same amount by doing moderate even-paced cardio on the same machine.

So yea, my question is: 1) what should my heart rate be to burn maximum fat? 2) During the 'hard' part of a HIIT workout, what should my heart rate be climbing up to? What does yours go up to?

I am 19 years old, 5'3 and 140 lbs by the way. Looking to lose 20 lbs. Thanks everyone.[/QUOTE]
1) as high as you can get it without having a heart attack. With that said - if you want a rough guestimate -> [url]http://www.briancalkins.com/HeartRate.htm[/url] < this is a more accurate way to calculate your heart rate based on resting heart rate and age... And for HIIT, you want to be up near 90-100%

2) part a -> as high as you can get it without having a heart attack.
2) part b -> as high as I can get it without having a heart attack. :o