Resources

Maximum Heart Rate (MHR)

208- (.7 X your age) 

or

220-age = MHR

Determine Recovery Heart Rate

Immediately following the aerobic activity, find your HR.  

Rest for 1 minute and check HR again.  

Subrtract 2nd number from the 1st.  How many beats did you recover in 1 minute?

The more you recovered (the faster your heart returns to normal), the better shape you are in.