Title What is baseballâs âmodern eraâ? The start of the 20th century might not seem particularly modernâafter all, there were only 45 states in the Union, hardly anyone owned a car (the Model T didnât debut until 1908) and William McKinley, a Civil War vet, occupied the White House.
Causes. Exercise is a common cause of rapid heart rate. Your heart rate should elevate during exercise, but it may be a problem if your heart rate remains elevated for more than 10 minutes after you finish your workout. Dehydration can also cause a faster heart rate.xercise is a common cause of rapid heart rate. Your heart rate should elevate during exercise, but it may be a problem if your heart rate remains elevated for more than 10 minutes after you finish your workout.
Other times, a fast heartbeat greater than 100 beats a minute is not normal and is the result of a problem with the heart or irregular electrical signals in the heart. If you have a fast heart rate, it could be caused by a type of tachycardia.There are many types of tachycardias.ther times, a fast heartbeat greater than 100 beats a minute is not normal and is the result of a problem with the heart or irregular electrical signals in the heart. If you have a fast heart rate, it could be caused by a type of tachycardia. There are many types of tachycardias.