Those max HR things are just estimates. It's really based on your conditioning and your age, with conditioning being more important. A max HR in the 190s sounds

Those max HR things are just estimates. It's really based on your conditioning and your age, with conditioning being more important. A max HR in the 190s sounds about right for your self reported level of conditioning and age at that time. Your max is whatever your max is before you collapse; it's not what a chart says.