220? - your age = your maximum heart rate
So for me, its 220 - 45 = 175
But is this just a guide and it really depends on a number of other factors, such as your level of fitnees, your genetics, family history, what-ever.
So for me, its 220 - 45 = 175
But is this just a guide and it really depends on a number of other factors, such as your level of fitnees, your genetics, family history, what-ever.