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Meter / beat - Meters per heartbeat - the athlete's fuel consumption!

It's more fun to be out and exercise, but when the body is sick, causing the brain to work. Sometimes it's incredibly fun to imagine and create things, I've made a DataField app called Meter / beat or Meters per heartbeat in Swedish. In this post I will show what Meters / beat app does. For more information about making apps for Garmin products (eg 920XT ) see my article on Garmin Connect IQ .


Power is a measure of how strong an engine is, as defined energy / time unit (unit [Joules / second = Watt = W]). It is possible to measure the effect on a car engine with horsepower. It is also possible to measure the effect of an athlete, but it's not as easy. On the bike's power meter (measuring power = force * distance / time). Measuring force is relatively difficult and power meters for bicycles are still expensive.

For swimming, running and other sports, it is not as easy to measure the athlete's power (since it does not go down in a rotating axis of a machine).

Other interesting measure of how efficiency / performance in an engine's fuel consumption (liters per kilometer). An efficient engine is at the same speed (work) efficiency (better) than a wasteful engine. But what is the equivalent measure for an athlete?

Purpose of measuring meters per heartbeat

When I was making my first app I was looking for a measurement that may be easier to produce than power (power [W]). I then thought of the relationship between speed and heart rate, which according to me is the solution. Given that no interference occurs (wind, temperature, different track profile, etc.) is the velocity at a given pulse is a measure that describes how effective an athlete's engine is! The pulse is usually measured in heartbeats per unit of time [bpm, beats per minute]. 60bpm is resting heart rate 180bpm and my maximum heart rate. Speed is defined as the distance per unit time. => Distance per time / heartbeats per time = meters per heartbeat.

Meters per heartbeat is the athlete's equivalent to fuel consumption.

Is it good?

Help me with this in a comment!


  • Meters per heartbeat can be used where there is GPS and heart rate monitor (eg sports swimming, running, biking or hiking)
  • Possible to compare the performance and development in a sport
  • Possible to compare the relative performance / performance development between different sports
  • Cheaper than power / pulse

Cons (?)

  • Speed and heart rate are affected by weather

Implementation of Garmin Connect IQ

Meter / beat - Meters per heartbeat is the earliest app in Garmin's app store. I have done a Data Field that can be used for this.

But it is expensive with power meter on the bike. It is also very difficult to measure the impact when running / swimming / ...
"Speed / heart rate" = "distance / heartbeat" is a measure which, like a car's engine shows efficiency.
Of course, the speed depends also on the slope, wind, shape, type of passport ... but given that the disturbances are taking themselves out over time should be an improvement made in this metrics at the same type of activity. The measurement can be just as useful (and also more accessible than power / watts).

meter / beat

Examples from a walk at Vallby-air museum. meters / beat = 0.9 on average. At a heart rate of 80 beats per minute, I thus average 1.2 meters / second.


Garmin Connect IQ

In my last article , I described my new Christmas present, Garmin 920XT, the first clock of the Garmin that will support the Apps! In this article, I thought to go deeper into Garmin Connect IQ and its SDK, which I have just explored. Garmin Connect IQ can be downloaded here . On the same page is a good introduction. It's a bit complicated to understand how it works by just reading - so learning by doing is recommended.

Garmin is planning for this to enable the development of four different types of Apps. Two of these can be developed with today (2015-01-05) SDK (0.2.4) to the operating system 2:57 (beta):

  • WATCH FACES means that SDK allows for a customized look for the page that appears when the clock is used as a normal watch. That is, when the clock is not recording an activity. The default app then displays the current time, battery level, number of steps during the current day, how many steps are left to today's goals and the current date. A new app, for example, show time analog instead of digital. Other possibilities are to display other information.
  • DataFields can also be customized as apps which I think is slightly more value-added than Watch Faces.
    What is a data field / data fields? Well, when the training hungry perform an activity, such as recording a run, he can (hen) see current time, distance, speed, heart rate, and other measurements. This is the standard version. The Garmin products, you can usually customize the pages that are available with the fields that clock support. In a DataFields app may App developer to create your own data values, which can then be used on the clock. This may be values not previously available.
ComplexDataField exempel

Complex Data Field Example

I have experimented with DataFields. Partly through the examples that come with the SDK and partly by making its own app. I was going to describe my app (Meters per heartbeat) in a new article. To the right is a picture from example-Applications in a Complex Data Field. Complex Data Field draws a graph of heart rate and speed while the current value is updated. This is the extended function against standard DataFields who can only view the current or the average of the same values.

The other two apptyperna planned from Garmin is not yet possible to experiment with because they are not available as part of the SDK 0.2.4 and OS 2:57. From the Garmin website is apparent, however, that if the plans:

  • Widgets are applications that may be coupled to WATCH Faces. The user may want to see details of the day's number of steps, or a calendar behind the current date. Do not know how they work because I have not been able to test drive!
  • WEARABLE APPS will probibly the most popular of the four appkategorierna. The reason is that these are described as the most flexible. They have access to everything available in the clock, external sensors and internet via wifi or bluetooth. It is possible for example to store data, generate your own values to .fit files. Saving data can not be done with a Data Field since this is only a view that is displayed when a task is run.

Another feature that is not currently available in the SDK is access to the accelerometer data. It's accelerometer data used to make smart algorithms that can predict the type of strokes, average soil under paydays or movement during sleep (just to name a few examples). I can think of many other algorithms that I would try to investigate and improve my behavior during training!

Garmin plans to open a store for apps soon (starting 2015).

I keep an eye out for testing WEARABLE APPS, accelerometer data, and other things that can be fun. Sometimes it's incredibly fun to imagine and create things!


Garmin 920XT

I just received a new gift, the Garmin 920XT . A nice clock for Triathlon and all types of exercise (the last that was 2014-12-24). Some new features like the clock has are:

  • Accelerometer
  • Wifi / Bluetooth syncstöd
  • Works for swimming indoors and outdoors
  • Measures of sleep and what to do during the day
  • First Garmin product supporting Apps *

* Garmin Connect IQ store is planned for January 2015. You can already developing apps with IQ Connect SDK .

The company Garmin is for me the symbol of GPS products. I bought my first GPS watch in 2007 (Garmin Forerunner 305). The time working today and has been terrific useful. I have until 2014-03-01 not had more features. It was on this date I started with Triathlon and realized it would be nice to be able to monitor training progress even in water.

Apps has been with competitor Suunto for two years and Apple's iPhone has built its business model on that. Garmin has probably recognized the opportunities that are picked up on free labor starts working on improving the user experience of their platform of products. I do not think we can afford to let Suunto run ahead ...


Activities in Liguria - Football, olive oil, cycling and water polo

Now a new week-end in Italy. Two weeks have passed quickly. I think I have done a lot so far but there is also much to look forward to. In two weeks my first and best visit, with Italian derby as one of the highlights (Juventus-Inter).


Veckans fotbollshöjdpunkt - Bombardier Italia mot ?: 3-3

This week's football highlight - Bombardier Italia v?: 3-3

This week I had a workout and two games. The most enjoyable job was with the guys at work. Game Time 22:00 every Thursday! We run a raven like series with CA13 law. There is one match a week throughout the year. The series ends with a playoff. Right now we are in the middle, something must change!

This week, we met a young team. Average age was perhaps 22. They were fast, technical and feeble. It meant a lot filming (in my eyes). The first goal was my fault. Took me a hand in the penalty area -> first penalty. 0-2 also came on a penalty and a new hand (not from me). In the second half worth it though Revange. We lay on and managed to turn to 3-3.

Olive oil

Olivträd - blir olja i november!

Olive trees - is oil in November!

Today I have been at Altin - a guy I play football with. His wife cooked (very good!) And we played on "Stryktipset" (Gothenburg and Kalmar will hopefully cross). He also took me up into the mountains outside Savona, where he has a piece of land where he grows olive trees. Very interesting and beautiful.

The output from this is that I've learned how to do to make olive oil. It is the black olives to use. In Japan do oil on the green olives - maybe not to mention what Altin thought about it ...

Unfortunately, it rained hard - so there was not much time outdoors. May take a new weekend ahead, planned to offer myself as labor.


Way home from Altin I realized that there was something pågång. The street was cordoned kind and full of policemen. Sure enough, after a bit around the interrogation, it was now time for the Milan-San Remo . A race in Italy for the elite. Cyclists Fabian Cancellara and Mark Cavendish was with, both have previously won this contest. This year it snowed in Milan. Participants were therefore go by bus to the coast and the start outside Genoa. The race was therefore much shorter, only 15 mil :)

I was there with camera and took a movie. Marveled at how incredibly fast it goes! Met at Fabio - a local cyclist - in the audience and began to talk to him. He runs a club in Savona. Maybe some cycling in Italy ahead.


Savona vann matchen med 13-10 mot Sicilien

Savona won the match 13-10 against Sicily

Another activity of the weekend was water polo. This is the biggest sport in Sanvona. The team is 3rd in the league and traditionally very good. This year the team is young and they aim to win the league next year. Italy is apparently reigning world champion in water polo league so high class.

Looking at water polo was kind like watching handball. Much goal back and forth and around the same rules. One difference, however, was that it was very hot and humid in the hall :) .

Authored by David Gustafsson in: Ego , Italy | Tags: , , , , ,

Cross Country Skiing in Italy - Limone Piemonte

Today I including riding a turn to the Italian mountains to go skiing. From Savona / Genoa is far til Val di Fiemme. It is more than three hours. But fortunately, there are areas that are better distance.

A good site that lists the ski area is j2ski . The recommended. I chose to go to Limone Piemonte, because there would be tracks where nordic skiing. There were traces - 5 km classic or skate. Before I tell you more about this, a detour.

Stopped by Police

An earlier impression is that there are many who drive recklessly on the roads down here. Påväg Limone Piemonte, I passed a small community. It was 50, but all were kind 70. The cars ahead of me running on a small Fiat Punto. It was white and four-wheel drive. To avoid the risk that people honk at me from behind I do the same thing, which I of course would not be done. I made three mistakes:

  1. Driving too fast.
  2. Went over a continuous white line.
  3. Did not the police check for snow chains which was 100 meters further until it was too late.

In retrospect, I see two policemen rushing towards his car. Jahapp, then it was only to stay! The communication was done with sign language and with a book that had English translation. They showed me a side of the crossed driving license and laughed while they pointed at me and said 'al pie, al pie ". After some discussion ended, however, the incident with a "warning".

Limone Piemonte, the cross-country trails

The tracks which would be 5 km, was after measurement was about 3.5 km. It was certainly 10% incline on average. Ski team makes new tracks every day. They charge € 7 in track charge. In the shop there are ski rentals and ski wax.

Skidspår Limone Piemonte

Country skiing Limone Piemonte

Basically it was a "switchback" pitch in for 2 km and then a descent. Utförslöpan stopped at a bar. There sat the lion's share of all Italians. After a while, I also :) It was really hot (+ 10ºC) and blue sky. Drove with rolled up legs and short sleeves.

Authored by David Gustafsson in: Italy | Tags: ,

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