Any sort of aerobic exercise machine which has a heart-rate monitor (those metal handles you grip), at any gym, and this happens consistently on every piece of equipment I’ve used as far back as I can recall, is incapable of measuring my heart rate 95% of the time.

What happens is that I’ll grip the metal handles and “HR” will flash on the display for about 30 seconds, and either:

# The display will go blank.
# “HR” will continue to flash indefinitely.
# The display will track my pulse at around half of what it actually is.

I’m not sure what this means; those heart rate monitors can’t be that unreliable. Maybe it’s a conspiracy. Maybe I’m just ”abnormal”.