EnergyPointer tells you during a training session if the main effect of your training is fat burning or fitness improvement.
Your Polar Loop 2 automatically calculates a personalized turning point where the main effect of your training turns from fat burning to fitness improving. This point is called EnergyPointer. The average EnergyPointer value corresponds to 69% of your maximum heart rate. However, it is normal that EnergyPointer value varies as your daily physical and mental condition varies. Your Polar Loop 2 detects your body's daily state from your heart rate and heart rate variability and, if necessary, adjusts the EnergyPointer accordingly. For example, if your body is recovered from previous training session and you're not tired or stressed, then you are prepared for more intensive training and the Energy Pointer value changes. The highest possible value of EnergyPointer is 80% of your maximum heart rate.