Training based on speed or heart rate is a long-term process and sometimes asks a lot of your body. Sleep or your physical condition can also influence this. When you choose to train on power, you choose the fastest way to your ideal form. You listen carefully to your body and you will see results quickly. Of course, training with a heart rate monitor and a power meter is the very best option. However, training on power is the most efficient way to achieve performance. After all, power is independent of weather conditions, stress or the shape of the day. As a result, this value in wattage is always consistent and you can make rapid progress.