How accurate are these watches that tell you how many calories you used during a workout? Well, not exactly.
A friend of mine told me recently that she did a 960 calorie workout. And although I would like to believe that it is simply not realistic to raise the best fat loss tool known to man.
It is difficult to know exactly how many calories you have used during a workout. This will depend on the exercises (a squat consumes more fuel than a curl), the number of reps, the training methods used, and the number of muscles you recruited during each repetition -60 seconds can consume 7-10 calories, at one Up to 40 calories can be squat in one minute (Victor M. Reis, RS 201
If you perform 4 such sets, we are talking about 160 calories. Exercising with the same parameters can result in another 160 calories. Then, if you have four smaller exercises, it could add 350-400 calories. Such a workout would consume 650-700 calories and it would be hellish work.
Upper body hypertrophy training may consume 250-400 calories more than your normal calorie consumption for the duration of your workout. The lower body may consume up to 500-700 calories more than your normal calorie consumption, and total body workouts might be in the range of 300-500 calories.
I believe that calorie consumption is estimated by these watches / apps mainly use heart rate as a measure of energy consumption. These formulas have been developed with a view to cardiovascular training. In this type of exercise, heart rate is directly proportional to energy consumption because heart rate increases only when the heart has to pump blood into the muscles to deliver oxygen to produce fuel.
During strength training, the increase in heart rate may also be due to a high release of adrenaline. In addition, the heart rate may increase for the duration of the set and remain elevated during idle periods due to adrenaline / neuronal activation, although no work is done. As a result, these instruments dramatically overestimate how many calories you burn during a workout.
Why is that a problem?
By giving the impression that you are burning a ton of calories, you may be eating too much food or too much food.
"I've just consumed 1200 calories in my workout! I can eat this burger because it only has 600 calories!"
No, you can not. According to the grand scheme of things, it is not the end of the world, but it is still misleading.
Your fitness tracker sucks
Question of Strength 57