Go Back  Bike Forums > Bike Forums > Training & Nutrition
Reload this Page >

Heart rate monitors

Training & Nutrition Learn how to develop a training schedule that's good for you. What should you eat and drink on your ride? Learn everything you need to know about training and nutrition here.

Heart rate monitors

Old 04-25-19, 12:35 PM
  #1  
Jonahhobbes
Gutter Bunny
Thread Starter
 
Jonahhobbes's Avatar
 
Join Date: Feb 2008
Posts: 953
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 15 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Heart rate monitors

Not able to ride to work at the moment as I've changed jobs, so I'm using a treadmill for running at home.

I'm just wondering why I can burn 250 calories on my bike for 20mins but running on a treadmill for the same amount of time only registers about 50 calories? My HR is considerably higher on the treadmill as I've adjusted the speed and incline to get a workout.

I'm using a Wahoo HR monitor with Runkeeper. I'm obviously not recording distance on the treradmill.

How do HR monitors calculate calorie burn? I assumed it was weight, hight and HR but obviously something else is going on.
Jonahhobbes is offline  
Old 04-25-19, 12:52 PM
  #2  
redlude97
Senior Member
 
Join Date: Sep 2011
Posts: 4,190
Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 1669 Post(s)
Liked 23 Times in 19 Posts
How are you calculating calories burned on the bike? The only semi accurate way on a bike is to use a powermeter and converting work done to calories burned using a small range of efficiencies from human physiology. HR is a poor way to calculate calories burned for both cycling and running
redlude97 is offline  
Old 04-25-19, 12:55 PM
  #3  
Iride01
Senior Member
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 2,329

Bikes: '91 Schwinn Paramount '78 Raleigh Competition GS

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 864 Post(s)
Liked 27 Times in 24 Posts
There is no easy way to calculate your actual Calorie burn. It's all guesstimation based on things that give clues to how much effort you are expending. In the worst case scenario, but touted as highly accurate by bean counters that want numbers to add up some devices just use simple formulas that produce consistent numbers for time and distance traveled.

However from the numbers you are spouting, your bike Calories burned seem high. Also, if your HR monitor is made for only one type activity such as cycling, then any attempt to determine Calorie burn for other activities is definitely questionable.

Last edited by Iride01; 04-25-19 at 01:05 PM.
Iride01 is offline  
Old 04-25-19, 01:09 PM
  #4  
OBoile
Senior Member
 
Join Date: Aug 2015
Posts: 1,264
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 728 Post(s)
Liked 63 Times in 31 Posts
I don't think it's possible to only burn 50 calories while running for 20 minutes. That calorie count is definitely off.

250 calories on a bike in 20 minutes is a bit more than 200 watts. Definitely within the realm or possibility but higher than what most non-competitive cyclists would be doing unless they were going fairly hard.

Generally speaking, most people will burn more calories per minute running than cycling.
OBoile is offline  
Old 04-25-19, 01:31 PM
  #5  
Carbonfiberboy 
just another gosling
 
Carbonfiberboy's Avatar
 
Join Date: Feb 2007
Location: Everett, WA
Posts: 14,975

Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004

Mentioned: 86 Post(s)
Tagged: 0 Thread(s)
Quoted: 1795 Post(s)
Liked 39 Times in 30 Posts
It's because your apps are using the GPS in your phone. Use an ordinary HR monitor instead, if you want some caloric approximation. Usually HRMs guess on the high side so you like them more, some 50% high. Customer enjoyment = sales. Of course a bike power meter does you no good on your treadmill, though some aerobic gym equipment has built in PMs where you enter your weight. My experience with those is that they are more accurate than an HRM. As above, kJ is about = to calories.
__________________
Results matter
Carbonfiberboy is offline  
Old 04-25-19, 06:14 PM
  #6  
Seattle Forrest
Senior Member
 
Seattle Forrest's Avatar
 
Join Date: Mar 2010
Location: Seattle, WA
Posts: 19,088
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quoted: 7992 Post(s)
Liked 197 Times in 129 Posts
Calories burned running ~= 2/3 your weight in pounds * miles ran.
Seattle Forrest is offline  
Old 04-27-19, 10:43 AM
  #7  
rubiksoval
Senior Member
 
Join Date: Nov 2015
Location: Music City, USA
Posts: 2,910

Bikes: Felt AR

Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 1691 Post(s)
Liked 70 Times in 42 Posts
Originally Posted by Jonahhobbes View Post
Not able to ride to work at the moment as I've changed jobs, so I'm using a treadmill for running at home.

I'm just wondering why I can burn 250 calories on my bike for 20mins but running on a treadmill for the same amount of time only registers about 50 calories? My HR is considerably higher on the treadmill as I've adjusted the speed and incline to get a workout.
Because those numbers are totally made up?

Unless you're pushing decent power, you're not burning 250 calories in 20 minutes on your bike.

Running at the same exertion level would burn more calories. Full body movement and all.
rubiksoval is offline  
Old 04-29-19, 10:37 AM
  #8  
Seattle Forrest
Senior Member
 
Seattle Forrest's Avatar
 
Join Date: Mar 2010
Location: Seattle, WA
Posts: 19,088
Mentioned: 43 Post(s)
Tagged: 0 Thread(s)
Quoted: 7992 Post(s)
Liked 197 Times in 129 Posts
Running = jumping from leg to leg. Running is a gait, not a speed, you're running if both feet keep coming off the ground together.

Cycling = sitting down.

You can work very hard on a bike, but you work harder running.
Seattle Forrest is offline  
Old 05-03-19, 04:22 AM
  #9  
jpescatore
Senior Member
 
Join Date: Oct 2017
Location: Ashton, MD USA
Posts: 433

Bikes: Trek Domane SL6 Disc, Trek 520

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 130 Post(s)
Liked 7 Times in 7 Posts
A moderate speeds, say a 12 minute mile running and biking around 12 miles per hour, you will burn pretty close to the same calories per hour - roughly 500 calories for the 5 miles you ran and the 12 miles you biked.

If you run 50% faster, you will still burn about the same amount per mile but you will run more miles in that hour and burn more calories.

If you bike 50% faster outside, you will have to burn more calories per mile because the wind resistance goes up. On an exercise bike, there is no wind resistance - you will burn the same number of calories per mile but just like running you will burn more per hour - and still about the same per mile as running.

The short answer was earlier in the thread: ignore any calories burned numbers on any exercise equipment.
jpescatore is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
crank_addict
Classic & Vintage
6
05-18-16 06:37 PM
gilaasepeda
Road Cycling
11
04-02-15 09:50 AM
saintsfan342000
Foo
0
08-23-08 10:41 AM
ilmooz
Advocacy & Safety
13
06-19-08 06:24 AM
geoGraphicFTD
Singlespeed & Fixed Gear
111
05-03-07 04:22 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.