How can you accuratelly tell if you are in your target heart zone while training for fat loss when most people are taking an Ephedra-Caffeine stack which is known to raise blood pressure and heart rate? laters pk
How can you accuratelly tell if you are in your target heart zone while training for fat loss when most people are taking an Ephedra-Caffeine stack which is known to raise blood pressure and heart rate? laters pk