Calories to watts converter

Chris Froome can put out an astonishing watts for 30 minutes, his kcal expenditure during that time period would be:. In many ways, the difference between an amateur athlete and a pro is their ability to burn more calories more quickly. Obviously, there are some limitations of our equation.

Namely, the human inefficiency part of our calculation. So, let us say you commute at an average of W, every ten hours of commuting time will burn a pound of fat. If your commute takes half an hour, two weeks are all you need to lose a pound of fat.

If you commute at an average of W, every ten hours you will burn a pound of fat. Similarly, if I get on Zwift three times a week for an hour and a half and put out an average of W I can expect to burn 3, kcal a week.

Just about a pound of fat a week. A single Butterfinger candy bar is kcal, which equates to 23 minutes of riding at W. The energy a more advanced cyclist uses is much less. The body loses a lot of this to inefficiencies on a bicycle and in general output. My biggest note is the change for an advanced cyclist.

Say during a 1 hour commute you get from point A to point B with average watts, this might burn calories or so for you, but an advanced track? Say point A to B was 23 miles, and A to C was 35 miles, the faster cyclist used less energy to go from A to B, and in fact, if they rode at a normal pace of watts instead to B, they could have only used or kcalories as their riding Notaccounting at all for aerodynamic posture nor for gear changing Has given the more advanced rider better recruiting of muscles and better blood work, allowing them a higher efficiency.

The more advanced riders ratio of use of calories at watt averages also improves. In short, the pure muscular fitness of a more advanced cyclist makes their numbers actually decrease for the same distance, or the same watts.

This gets more impressive with aerodynamic mechanical and line focus improvements, and then even better when gear improves. It makes a difference sometimes the difference between willing to do the work or not.

Racing is all the more. You must give yourself primarily the time it takes to build base fitness when prepping to ride for real. I think you might be conflating a few things here. Yes, in general a professional cyclist can go the same distance using less energy as a fit body is certainly more efficient metabolically than an unfit one. That said, going fast in cycling means exponentially more energy is needed as air resistance is an exponential function of speed.

Some quick calculations: a lb cyclist on a flat road can ride at 15 mph at about 88 watts. They can speed up to 16 mph by putting out watts, a 17 watt bump. If they want to speed up to 26 mph that will require about watts. So you can see, going the same distance at a higher speed actually requires more energy expenditure, even when accounting for metabolic efficiency. Hence, why fitness can be boiled down to the ability to burn calories quickly, a pro cyclist can burn calories a minute during hard effort.

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