need help from cyclists

liamrose
liamrose Posts: 17 Member
in Fitness and Exercise
i went for a 17.52 mile (28km) ride this morning. ive got a Garmin forerunner 305 and its telling me ive burned 1923 cal. did it in 1h 12mins. what i want to no is do you think that's about right??? or is that way out? im 6 foot, 191 pounds.

Replies

  • fire_under_ice
    fire_under_ice Posts: 14 Member
    I usually have a bike ride twice a week, cycling around 40- 50 miles in total. I'm reasonably fit but I wouldn't call myself a cycle specialist at all. On my road bike I usually cover approximately 26 - 27 km in an hour - so a broadly similar sort of pace to you - with an average heart rate of about 125-130 bpm. I'm also 6' but a little lighter (now!) at 172lbs.

    My Garmin 610 gives me a calorie burn of about 720 cals per hour for that sort of pace. The only time I've got that sort of burn is a recent ride where I cycled 68km in 2hr 40mins at similar pace resulting in 1909 calories burnt.

    Unless you're riding much steeper hills than I am or your exertion is much greater to maintain that speed than mine is I think that sounds a little on the high side. What sort of heart rate readings are you recording?
  • jim180155
    jim180155 Posts: 769 Member
    1600 calories per hour? That sounds way too high.
  • Shropshire1959
    Shropshire1959 Posts: 982 Member
    i went for a 17.52 mile (28km) ride this morning. ive got a Garmin forerunner 305 and its telling me ive burned 1923 cal. did it in 1h 12mins. what i want to no is do you think that's about right??? or is that way out? im 6 foot, 191 pounds.

    Put your ride into strava and see what it says
  • castlerobber
    castlerobber Posts: 528 Member
    Sounds high to me, unless you were riding up L'Alpe d'Huez. :bigsmile:

    Does your Garmin think you're running instead of cycling, perhaps?
  • SingingSingleTracker
    SingingSingleTracker Posts: 1,866 Member
    i went for a 17.52 mile (28km) ride this morning. ive got a Garmin forerunner 305 and its telling me ive burned 1923 cal. did it in 1h 12mins. what i want to no is do you think that's about right??? or is that way out? im 6 foot, 191 pounds.

    That's way too high.
  • dbmata
    dbmata Posts: 12,950 Member
    I'd think 700 range is a little more realistic.
  • Chain_Ring
    Chain_Ring Posts: 753 Member
    That's way off.........does the 305 use heart rate as a factor to determine calorie burn? I know the 500 series and above definitely does. Make sure all your variable are programmed in correctly and I'd do a hard reset on the unit itself as well.
  • pyrowill
    pyrowill Posts: 1,163 Member
    Yeah sounds way too high dude. I am 215lbs 5ft9 and I burn about 700-800 cals an hour doing hard cycling. Although I am quite fit with it, at my most unfit I'd say max 900 cals an hour.
  • GenoPrice
    GenoPrice Posts: 477 Member
    I looked into this months ago and the FR305 is not accurate for calorie burns, especially when cycling. It doesn't use HR to calculate calories burned. I have also found it inaccurate for running, I can do an easy recovery run, tempo run, interval session all following the same course for the same distance and have exactly the same calorie burn. Re: Cycling see thread below.

    http://www.beginnertriathlete.com/discussion/forums/thread-view.asp?tid=252098

    Old MFP thread

    http://www.myfitnesspal.com/topics/show/103100-help-with-garmin-forerunner-305-hrm

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