5/15/2023 0 Comments Polar calorie tracker![]() That is: you’ll forego lesser energy-dense foods for more energy-dense ones. Glucose is the only immediate source, and protein, fat, and alcohol, must all be converted into suitable-length carbon chains.Įating fat won’t help you change your body composition, regardless of leptin and grhelin and satiety, because you’ll be forced to replace foods with 4kcal per gram, with foods that have 9kcal per gram. So that’s why fat is not a direct source of energy. Triglycerides require beta oxidation in order to be used for cells to make proteins etc. Exceptions would be if you had thyroid dysfunction, for instance. And measuring calories in, calories out, if done systematically, is the only sure-fire method to have a reasonable measure of the ‘energy budget’ of one’s body. But it’s the only estimate consumers have. But: you’ll need to subtract the amount of energy that would’ve been expended just for keeping them cells of yours alive!Īs far as the energy listed on food labels: obviously it’s an estimate. So, any heartrate increase above that baseline for a given period of time, is correlated with the amount of energy (‘calories’) expended for that time. That’s because your heart is always pumping, in order to keep cells respiring. Heartrate calculations, on the other hand, require a subtraction of a baseline energy amount. ![]() Because zwift only calculates ‘pizza slices’ based on work done, you don’t have to subtract a ‘baseline’ amount of energy from your overall calculated energy output at the end of your ride, because your ‘baseline metabolic work’, is zero. When you’re sitting around doing nothing, you’re not moving anything, so the work, in joules, is zero. A joule, roughly, is the amount of work done by a force to move an object through a given distance. Let’s start with definitions.Ī calorie, or kilocalorie, is a unit of some form of energy (the energy required to increase the kinetic energy of the water molecules in a volume of water). Hope this somewhat clarifies why Calories can be seen as important.ĭear Udi - and anyone else who’s interested. Watts, weight, height, gender, and hear rate are all important when looking at weight loss, endurance building, strength training, hormones, and an overall healthy lifestyle. ![]() When it comes to calories there is most definitely a role. Theoretically, your HR zone will indicated what type of energy system you are using (aerobic vs anaerobic) this relationship can also help indicate what type of energy/ calorie we should consume (long and slow= no need for fast metabolizing sugars IN HIGH amounts/, hard and fast = sugars please). Consuming calories, often referred to as the 4th discipline in ironman, is extremely important when performing at high levels. If zwift is only using watts as a source, it might not be accurate for an individual who has a phenomenal Vo2max compared to someone who doesn’t (and other factors as well)įor sure there are those who use it for weight loss but there are also those who use it to tailor the calorie intake on long endurance rides. Very late to this forum but came across this and figured I would answer nonetheless.Ĭalories are important as a estimate in energy expenditure. They didn’t evaluate the AW200 during other activities. ![]() For example, in a study published in a March 2010 issue of the *, researchers found that the Polar Activity Watch 200 fell within the accepted 10 percent error threshold of calorie estimates - when used while hiking. The answer is a mixed bag, depending on which model is evaluated and the activity that they were used to gauge. None of the devices were from the Polar brand, but the findings are still helpful for understanding that even when heart rate accuracy was good, the accuracy of measuring energy expenditure was not: The most accurate device was off by 27 percent, and the least accurate was off by a staggering 93 percent.īut with Polar heart rate monitors so often functioning as the gold standard for measuring heart rate, is it possible that they fare better? The researchers evaluated seven fitness-tracking devices with the help of a small group of 60 volunteers and found that six of the devices were accurate for heart rate to within 5 percent. I don’t know why Zwift doesn’t give you the option of using data from Polar. I can assure you Polar or Map My Ride estimates are probably more accurate based on the article below. I weigh myself after my cycling workouts. Map my ride and Polar indicate around the same amount of calories burned when compared to Zwift. I’m using the Polar OH-1+ (forearm/bicep heart rate monitor).
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