In reply to Voltemands:
MAX Hr right?
If you look at the data on the computer you will probably find the 220+ figure is a spike, unless your HR goes smoothly up to that figure and then down again. A spike is where the device mis-records a value - normally the problem is that the chest strap is either not tight enough or isn't wet enough, so that a single reading is read as two.
If you do a proper max test, you **may** find your Max HR goes up to about 200 or even 210, but 220+ is very rare for a true max.
If you do this, theh yes, so adjust the HRM, but dont' do it of the result of a single reading. Look at the HR Graphs...