I need to use my HR monitor every time I train! Not true. When you are ridiculously tired or stressed [other reasons are in Part II] just try the “Talk Test”.
That is stupid!~ some people might say. Contrary to what you may think a lot of research has been done relating to the “Talk Test”. It showed that when people had significant difficulty with their talking, they were at/ or very close to their lactate threshold [where muscles can no longer metabolize and remove lactic acid as it builds during exercise].
So the next time you go running, you can leave your HR monitor at home and try the “Talk Test”.
Easy: carrying on a conversation with no effort
Medium: having to pause for breath after a sentence (or two or three)
Hard: cannot carry on a conversation (just maybe a few words here or there)