Normal is not just 70-75...it is much more variable than that and dependent on a number of factors including whether you are standing, walking, etc and your age and relative fitness level. A RESTING heart rate
of 101-105 could be considered high, but would be acceptable for someone up and walking.
A number of factors could increase your heart rate. Anxiety
, smoking, caffeine, dehydration
, certain medications as well as a number of underlying medical conditions.
If your heart rate is over 100 at rest, and you are not taking any medications or if it is accompanied by chest pain
, shortness of breath
, etc. it should be evaluated by a physician. The cure will depend on the cause...if dehydrated, drink water, if smoking, quit...etc.