MartaPisze Zone 2 cardio: what is it, how long should the training last and does it really help burn fat? | SpotMeUp Heart rate zone training is one of the hottest topics of 2026. Check what zone 2 really is, how to recognize it and for whom this model makes sense.... cardio a odchudzanie cardio na spalanie tłuszczu trening stref tętna trening wydolnościowy tętno treningowe umiarkowane cardio zone 2 cardio
