A calculator for the calories burned when cycling at a certain heart rate. Of course, the frequency changes frequently while riding a bicycle. Here you should specify an approximate average, for example 120 at medium intensity.
The difference in calorie consumption between women and men is mainly due to the fact that they both have a different body composition. Muscle and fat are distributed differently. The generally lower muscle mass in women leads to less efficient work, which increases calorie consumption. The formulas on which this calculation is based are of course only approximate formulas; the calculated values should not be seen as exact values.
Cycling is one of many good methods of training. Whether you cycle or choose another training method ultimately depends primarily on your own preferences. If you do what you like, it is much easier to motivate yourself and train regularly. If you like cycling, then you should do that; otherwise, find something else. When cycling, it is important that there are safe routes available; if possible, avoid busy roads because of the bad air caused by combustion engines. A bicycle helmet is recommended.