Threadmill lies to me pretty much all the time. In most cases it doesn&#x27;t even work for me.
Unless you have a medical condition, it is very unlikely that you&#x27;ll get 180bpm from 5km&#x2F;h walk (mine usually don&#x27;t go above 150 even going uphill with 20 pounds weight vest on my shoulders). 180bpm is 3 hearbeats every second - pretty easy to check with finger on your wrist.