New HRM and P90x

masterkaj
masterkaj Posts: 1
edited October 2024 in Fitness and Exercise
Just bought a Polar FT7 HRM and used it today during my second week of P90x.

Here are my results for the Plyometrics (hardest one of the series) and I would like to hear your input:

Avg HR: 176
Max HR: 194
Fat burned period: 12 seconds
Fitness period: 1 hour 2 minutes 41 seconds
Total duration: 1 hour 3 minutes 2 seconds
Calories burned: 1232

How accurate is the calories burned?

A little background on myself. I was very athletic in high school and used to only weight around 145 with a body fat percentage of 10 percent. I have always been able to eat whatever I want and not really gain weight. However, I kind of slacked off while in college. In addition to that, I hurt my ankle and was unable to run for two years; luckily I was able to finally get surgery and am able to work out again.

I try to push myself during P90x and consider myself in "decent" shape now. I am 25 years old, 6'1" and weigh around 190 currently. Right now I have a body fat percentage around 18-22 percent (high for me). I am trying to get close to my high school form, 165-170 is around my goal.

Replies

  • irefusetoquit
    irefusetoquit Posts: 62
    Wow! Sounds like you had a very hard Plyo workout! Impressive!!!

    I think P90X will get you into the shape you're looking for. Great job so far! Keep me posted on the rest of the x! Bring it!!!
    --James
  • xxquzme
    xxquzme Posts: 157 Member
    Sounds about right to me. I am bigger than you are and for the most part i tend to burn about 1000 cals an hour. However with p90x or spin class i do generally hit the 1200 cal mark.
  • mrtentaclenun
    mrtentaclenun Posts: 174 Member
    Wow I never hit 600 doing plyo, is my hrm wrong???
  • m0_0m
    m0_0m Posts: 265 Member
    Wow I never hit 600 doing plyo, is my hrm wrong???

    Don't think so. I usually was right around 500 give or take when I did plyo.
  • jlewis2896
    jlewis2896 Posts: 763 Member
    Yep, I am usually right around 500.

    But to masterkj -- I am sure that burn is correct for you. Way to push yourself, that is a FANTASTIC workout!!
  • LesliePierceRN
    LesliePierceRN Posts: 860 Member
    Calories burned is a function of oxygen consumed... and it's a given if you heartrate goes up, you're needing more oxygen to perform the functions that your body is experiencing.. hence calorie calculation via hrm. No one knows for sure how many calories are consumed during any particular exercise, they all use their own best guess algorithms.. So I'd just go with it.. Your only other solution is to wear several different brands of hrm at the same time and take an average. Not real ideal.
  • mewaybright
    mewaybright Posts: 240 Member
    Those numbers sound close. I usually burn around 900 up for an hour of Plyo and I only weigh 178 and have been working out with P90X since April with a resting HR of 53 (last time checked) my max HR is 178 and I am usually in the 160's when doing plyo. Legs and back with Ab ripper has a tendency to burn more calories for me possibly because it is a 16 minute longer workout.
  • firedragon064
    firedragon064 Posts: 1,082 Member
    I used this website
    http://www.triathlontrainingblog.com/calculators/calories-burned-calculator-based-on-average-heart-rate/
    for VO2 max 35. For yours it showed 1068

    I just did Plyo yesterday
    47 yrs old female 187lbs, average heart ragte 149, max 187 V02 max 47 Burned 641
  • Azdak
    Azdak Posts: 8,281 Member
    Just bought a Polar FT7 HRM and used it today during my second week of P90x.

    Here are my results for the Plyometrics (hardest one of the series) and I would like to hear your input:

    Avg HR: 176
    Max HR: 194
    Fat burned period: 12 seconds
    Fitness period: 1 hour 2 minutes 41 seconds
    Total duration: 1 hour 3 minutes 2 seconds
    Calories burned: 1232

    How accurate is the calories burned?

    A little background on myself. I was very athletic in high school and used to only weight around 145 with a body fat percentage of 10 percent. I have always been able to eat whatever I want and not really gain weight. However, I kind of slacked off while in college. In addition to that, I hurt my ankle and was unable to run for two years; luckily I was able to finally get surgery and am able to work out again.

    I try to push myself during P90x and consider myself in "decent" shape now. I am 25 years old, 6'1" and weigh around 190 currently. Right now I have a body fat percentage around 18-22 percent (high for me). I am trying to get close to my high school form, 165-170 is around my goal.

    At your weight, that calorie burn is the equivalent of running 7.0 mph for an entire hour non-stop. Use that as a gauge of effort. I don't know how well the FT7 accounts for cardiovascular drift (HR increases over time during exercise with no increase in effort) or the exact structure of the workout. It's a reasonable number -- within 15%-20%, which is as accurate as an HRM is going to be. The farther away the structure of the workout routine is from a standard, steady-state cardio workout, the less accurate the HRM will be.
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